Random triples
| Subject | Object |
|---|---|
| gptkb:First_U.S._airmail_flight_(May_15,_1918) | letters |
| gptkb:San_Joaquin_Valley_Limited_Express_Mail_Special_Rocket | letters |
| gptkb:The_Pony_Express | letters |
| gptkb:The_Pony_Express | newspapers |
| gptkb:first_official_U.S._air_mail_flight | letters and parcels |
| gptkb:The_Pony_Express | government dispatches |