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 : Isaac Nicola Romero (1916 in Havana, Cuba -- 1997) was a prominent Cuban guitarist and one of the founders of the modern Cuban Guitar School. 
Question : What was Isaac Nicola's city of birth?
Example output: place of birth
Example explanation: The question is about the place of birth of the Isaac Nicola. Hence the output is relevant and valid
Q: Context : The Lair of Bones is an epic fantasy novel set in a land where men can bestow to each other a number of endowments, granting the recipient of the endowment attributes such as increased strength, a more acute sense of hearing, or better eyesight. 
Question : What is the series that The Lair of Bones is a part of?
A:
series