Concept completion question

A concept completion question is a type of short answer question. concept completion questions are formed according to the following abstract specification: "Who? What? What is the referent of a noun argument slot?". An example of concept completion question would be as follows: "Who ran this experiment?"

-Explainer: ["[Donna] So you're a college student?"]
-Explainee: ['Yes.']
-Explainer: ["[Donna] And what's your major?"]---> Concept completion question
-Explainee: ["I'm an engineering physics major with a minor in math.", "I'm in the three, two program for biomedical engineering."]