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 : Messier 99 was discovered by Pierre Méchain on March 17, 1781 along . 
Question : What constellation is Messier 99 in?

Answer: constellation


Question: Context : Directed by Tom Cherones, ``The Ex-Girlfriend'' was the first episode of the show filmed at CBS Studio Center in Los Angeles, California, the previous season having been filmed at Desilu Cahuenga in Hollywood. 
Question : What series is The Ex-Girlfriend from?

Answer: series


Question: Context : Lars Gathenhielm (1689--1718) was a Swedish merchant and privateer. 
Question : Which medical condition afflicts Lars Gathenhielm?

Answer:
medical condition