question: student:studying
choices.label: A B C D
choices.text: scholars:doing research writing:materials teacher:school result:survey
explanation: the main responsibility of the "student" is to "study". the main responsibility of "scholars" is to "do research". the necessary condition of "writing" is "materials". The main responsibility of "writing" is not "materials". the workplace of "teachers" is the "school". The main responsibility of "teachers" is not the "school". "results" can be obtained through "surveys". The main responsibility of "results" is not "surveys".
relation: student studying R3.10
relation: scholars doing research R3.10
relation: materials writing R5.4
relation: school teacher R3.10
relation: survey result R3.10