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.

Example Input: Context : Rothfuss wrote The Name of the Wind during his nine-year advance toward his B.S. in English. 
Question : The The Name of the Wind is part of a what series?
Example Output: series

Example Input: Context : The French police continued to use the MAS-38 after World War II until it was replaced in the 1950s by the MAT-49 submachine gun. 
Question : Which was the official year for the approval of MAS-38?
Example Output: service entry

Example Input: Context : In 1994, the U.S. military officially accepted the XM4 into service as the M4 carbine to replace M16A2s in certain roles. 
Question : What was the year that M4 carbine entered service?
Example Output:
service entry