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 : ``Cha-Ka'' is the first episode of the first season of the 1974 American television series Land of the Lost. 
Question : What is the series that Cha-Ka is a part of?
series

Context : Veera Thalattu is a 1998 Tamil language film directed by Kasthuri Raja. 
Question : Whose direction is Veera Thalattu?
director

Context : Jens Söring (born August 1, 1966, in Bangkok, Thailand) is a German citizen who in 1990 convicted of two counts of first-degree murder in Virginia, United States. 
Question : Which crime Jens Söring is considered to have commited?

convicted of