Classify the relation of question with context to one of these categories: 1) award received, 2) based on, collection, 3) conflict, 4) constellation, 5) convicted of, 6) date of death, 7) director, 8) drafted by, 9) educated at, 10) medical condition, 11) military branch, 12) narrative location, 13) occupation, 14) original network, 15) parent company, 16) point in time, 17) production company, 18) residence, 19) series, 20) service entry, 21) sex or gender, 22) spouse, 23) standards body question.

Context : ``I Saw What I Saw'' is the sixth episode of the sixth season of the American television medical drama Grey's Anatomy, and the show's 108th episode overall. 
Question : What series is I Saw What I Saw from?
series

Context : Thomas Neale (1641--1699) was an English project-manager and politician who was also the first person to hold a position equivalent to postmaster-general of the North American colonies. 
Question : What college did Thomas Neale go to?
educated at

Context : PSR B1257+12 was discovered by the Polish astronomer Aleksander Wolszczan on February 9, 1990 using the Arecibo radio telescope. 
Question : The star/galaxy PSR B1257+12 is in what constellation?

constellation