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 : In 622, the year of Muhammad's migration to Yathrib (now Medina), Ali risked his life by sleeping in Muhammad's bed to impersonate him and thwart an assassination plot so that Muhammad could escape in safety. 
Question : What is Ali's spouse's name?
spouse

Context : ``How a Bill Becomes a Law'' is the third episode of the fifth season of the American comedy television series Parks and Recreation, and the 71st overall episode of the series. 
Question : Which series is How a Bill Becomes a Law apart of?
series

Context : Jathibhanga massacre (Bengali: জাঠিভাঙ্গা হত্যাকান্ড) was a massacre of the emigrating Bengali population in the Jathibhanga area of Shukhanpukuri Union under Thakurgaon sub-division of greater Dinajpur district on 23 April 1971 by the Pakistani Army in collaboration with the Razakars. 
Question : The date of Jathibhanga massacre was what?

point in time