Data from a Graduate Course --Social Science

You are a graduate student taking a course with Prof Teacher. In this course Prof. Teacher gives the class some data from his/her ongoing research as illustrations. You also are told to use some of this data in your course assignments. In doing so, you notice that the trends in this data have some interesting implications for other research you did with Professor Study and are now writing up. You want to use some of Professor Teacher's data in you article to draw out these new implications.

Whom, if anyone, do you approach about this, how do you approach him or her, and what do you say?