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 : One night, however, Laius was drunk and fathered Oedipus with her. 
Question : What is Laius's spouse's name?
spouse

Context : Re-Animator is a 1985 American science fiction horror comedy film loosely based on the H. P. Lovecraft episodic novella ``Herbert West-- 
Question : Which is the basis of Re-Animator?
based on

Context : Cecilia Johansdotter of Sweden, (fl. 1193), is the traditional name of the Queen consort of King Canute I of Sweden and mother of King Eric X of Sweden. 
Question : What is Cecilia Johansdotter of Sweden's spouse's name?

spouse