question: lecturer:associate professor:professor
choices.label: A B C D
choices.text: master:phd:teaching assistant undergraduate:master:phd professor:research institute:academician administrator:librarian:research librarian
explanation: "lecturer", "associate professor" and "professor" are all in one category. "master" and "phd" are one category, and "assistant" is a teacher 's title. "undergraduate", "master" and "phd" are all in one category. "professor" is a teacher's title, "research institute" is an institution, and the person working in the "research institute" can be a "professor". "administrator" can be "librarian" and "librarian" can be "administrator".
relation: professor associate professor lecturer R2.4