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.

Ex Input:
Context : Virtually all battles that are considered part of the 'Battle of the Border' (with the exception of the Battle of Hel, which lasted for more than a month and the Battle of Mokra, a Polish defensive victory) resulted in rapid defeat of Polish forces, which were forced to abandon the regions of Pomerania, Greater Poland and Silesia. 
Question : When did Battle of the Border occur?

Ex Output:
point in time


Ex Input:
Context : Bored of the Rings is a parody of J. R. R. Tolkien's The Lord of the Rings. 
Question : Which is the basis of Bored of the Rings?

Ex Output:
based on


Ex Input:
Context : Simon Le Moyne was born at Beauvais, France in 1604. 
Question : What year did Simon Le Moyne die in?

Ex Output:

date of death