| gptkbp:instanceOf | gptkb:active_galactic_nucleus 
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                                | gptkbp:category | gptkb:BL_Lac_object gptkb:Flat-spectrum_radio_quasar_(FSRQ)
 Optically violent variable quasar (OVV quasar)
 
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                                | gptkbp:contains | gptkb:Supermassive_black_hole 
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                                | gptkbp:discoveredBy | 1960s 
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                                | gptkbp:distance | Hundreds of millions to billions of light-years 
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                                | gptkbp:emits | gptkb:X-rays gptkb:Gamma_rays
 gptkb:Radio_waves
 Optical light
 
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                                | gptkbp:first_identified_as | BL Lac objects and optically violent variable quasars 
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                                | gptkbp:hasFeature | Relativistic jet 
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                                | gptkbp:host_galaxy | gptkb:Elliptical_galaxy 
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                                | gptkbp:jet_points_toward | gptkb:Earth 
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                                | gptkbp:namedFor | gptkb:Edward_Spiegel 
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                                | gptkbp:notableExample | gptkb:Markarian_421 gptkb:Markarian_501
 gptkb:3C_273
 gptkb:BL_Lacertae
 
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                                | gptkbp:observedBy | Multi-wavelength astronomy 
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                                | gptkbp:polarization | High 
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                                | gptkbp:powerSource | Accretion disk 
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                                | gptkbp:shows | High polarization Non-thermal emission
 Strong variability
 Superluminal motion
 
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                                | gptkbp:source | gptkb:Neutrinos gptkb:Gravitational_waves
 gptkb:Cosmic_rays
 
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                                | gptkbp:studiedBy | gptkb:Very_Long_Baseline_Array gptkb:Fermi_Gamma-ray_Space_Telescope
 Astroparticle physics
 High-energy astrophysics
 
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                                | gptkbp:subclassOf | gptkb:Quasar gptkb:Radio_galaxy
 
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                                | gptkbp:variant | Rapid 
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                                | gptkbp:bfsParent | gptkb:OpenStack 
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                                | gptkbp:bfsLayer | 6 
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                                | https://www.w3.org/2000/01/rdf-schema#label | Blazar 
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