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.
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Question: Context : The 2013 Lake Grassmere earthquake was a magnitude 6.6 earthquake that occurred at 2:31:05 pm (NZST) on Friday 16 August 2013. 
Question : On what date did 2013 Lake Grassmere earthquake take place?

Answer: point in time


Question: Context : The Bill was the longest-running police procedural television series in the United Kingdom until its cancellation, and was among the longest running of any British television series. 
Question : What network did The Bill originally appear on?

Answer: original network


Question: Context : António Mendes Belo was born at São Pedro, Gouveia, (District of Guarda), Portugal, son of Miguel Mendes Belo and wife Rosalina dos Santos de Almeida da Mota. 
Question : When was António Mendes Belo's death?

Answer:
date of death