SPEAR2
E446219
SPEAR2 was an earlier-generation storage ring at the Stanford Synchrotron Radiation Lightsource that provided synchrotron radiation for research before being superseded by SPEAR3.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T4486829 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: SPEAR2 Context triple: [SPEAR3 synchrotron light source, precededBy, SPEAR2]
-
A.
SPERT-II
SPERT-II was a research nuclear reactor used in the SPERT program to study reactor safety and power excursion behavior under experimental conditions.
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B.
SPIRE
SPIRE is a far-infrared and submillimetre imaging and spectrometer instrument that studied cold dust and gas in the universe aboard the Herschel Space Observatory.
-
C.
S2
S2 is a line of Berlin's S-Bahn rapid transit network that connects northern and southern suburbs through the city center.
-
D.
S2
S2 is one of the commuter rail lines of the Nuremberg S-Bahn network in Germany, serving suburban and regional routes around the city.
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E.
Neptune Spear
Neptune Spear is the code name for the 2011 U.S. Navy SEAL operation that located and killed al-Qaeda leader Osama bin Laden in Pakistan.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: SPEAR2 Target entity description: SPEAR2 was an earlier-generation storage ring at the Stanford Synchrotron Radiation Lightsource that provided synchrotron radiation for research before being superseded by SPEAR3.
-
A.
SPERT-II
SPERT-II was a research nuclear reactor used in the SPERT program to study reactor safety and power excursion behavior under experimental conditions.
-
B.
SPIRE
SPIRE is a far-infrared and submillimetre imaging and spectrometer instrument that studied cold dust and gas in the universe aboard the Herschel Space Observatory.
-
C.
S2
S2 is a line of Berlin's S-Bahn rapid transit network that connects northern and southern suburbs through the city center.
-
D.
S2
S2 is one of the commuter rail lines of the Nuremberg S-Bahn network in Germany, serving suburban and regional routes around the city.
-
E.
Neptune Spear
Neptune Spear is the code name for the 2011 U.S. Navy SEAL operation that located and killed al-Qaeda leader Osama bin Laden in Pakistan.
- F. None of above. chosen
Statements (35)
| Predicate | Object |
|---|---|
| instanceOf |
storage ring
ⓘ
synchrotron radiation source ⓘ |
| affiliation | Stanford University ⓘ |
| associatedWith |
SLAC
ⓘ
linked to:
SLAC National Accelerator Laboratory
Stanford Synchrotron Radiation Lightsource (SSRL) ⓘ
linked to:
Stanford Synchrotron Radiation Lightsource
|
| country |
United States
ⓘ
linked to:
United States of America
|
| energyDomain | electron storage ring ⓘ |
| followedBy | SPEAR3 ⓘ |
| generation | earlier-generation storage ring at SSRL ⓘ |
| hasFunction |
generate synchrotron x-rays
ⓘ
store high-energy electron beams ⓘ |
| isUpgradeOf | SPEAR storage ring ⓘ |
| locatedIn |
Menlo Park, California
ⓘ
SLAC National Accelerator Laboratory ⓘ Stanford Synchrotron Radiation Lightsource ⓘ |
| name | SPEAR2 ⓘ |
| operator | SLAC National Accelerator Laboratory ⓘ |
| partOf |
Stanford Synchrotron Radiation Lightsource accelerator complex
ⓘ
linked to:
Stanford Synchrotron Radiation Lightsource
|
| precededBy | SPEAR ⓘ |
| provided | synchrotron radiation for user experiments ⓘ |
| radiationType | x-ray synchrotron radiation ⓘ |
| replacedBy | SPEAR3 ⓘ |
| researchField |
condensed matter physics
ⓘ
structural biology ⓘ surface science ⓘ synchrotron radiation science ⓘ |
| status | superseded ⓘ |
| successor |
SPEAR3 storage ring
ⓘ
linked to:
SPEAR3 synchrotron light source
|
| usedAtFacilityType | synchrotron light source ⓘ |
| usedFor |
biology experiments
ⓘ
chemistry experiments ⓘ materials science experiments ⓘ synchrotron radiation research ⓘ x-ray diffraction ⓘ x-ray spectroscopy ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: SPEAR2 Description of subject: SPEAR2 was an earlier-generation storage ring at the Stanford Synchrotron Radiation Lightsource that provided synchrotron radiation for research before being superseded by SPEAR3.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: SPEAR2