TASK DEFINITION: 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.
PROBLEM: Context : Lisa Cross (born 4 April 1978) is a professional British female bodybuilder. 
Question : What gender class does Lisa Cross belong to?

SOLUTION: sex or gender

PROBLEM: Context : Greta Knutson or Knutson-Tzara (also known as Greta Knutson; 1899--1983) was a Swedish modernist visual artist, art critic, short story writer and poet. 
Question : What was the date of death of Greta Knutson?

SOLUTION: date of death

PROBLEM: Context : Hartmut Schairer was killed on 19 July 1942 by Soviet forces over Staraya Russa, Russia, his gunner and fellow Knight's Cross recipient Oberfeldwebel Heinz Bevernis was also killed. 
Question : In what war did Hartmut Schairer fight?

SOLUTION:
conflict