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 : The first astronomer to record the Butterfly Cluster's existence was Giovanni Battista Hodierna in 1654. 
Question : What constellation is home to Butterfly Cluster?
constellation

Context : From 1976 to 1980, Gerd Langguth was a member of the Bundestag for the Christian Democratic Union. 
Question : What was the date of death of Gerd Langguth?
date of death

Context : Vice-Admiral William Lechmere died at Hill House, Steeple Aston, Oxfordshire on 12 December 1815 at the age of 63. 
Question : To which branch did William Lechmere belong?

military branch