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.

Q: 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?

A: point in time
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Q: Context : Bernard Rubin (6 December 1896 -- 27 June 1936) was an Australian born racing driver and pilot who was a member of the ``Bentley Boys'' team at the Bentley Motor Company and winner of the 1928 24 Hours of Le Mans. 
Question : What medical condition does Bernard Rubin have?

A: medical condition
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Q: Context : Goodby, Silverstein & Partners (also known as GSP) is an advertising agency based in San Francisco. 
Question : What company is Goodby, Silverstein & Partners part of?

A:
parent company
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