Detailed Instructions: Given a sentence and two mentions from the text (arguments), indicate a phrase (a verb or noun phrase) that describes the relationship between the provided arguments.
Problem:Sentence: 'Margaret Sanger , the founder of Planned Parenthood , was a proponent of ace hygienethrough egative eugenics ,an attempt to reduce the fertility of ysgenicgroups , in the early 20th century .', Argument/Subject 1: 'sanger', Argument/Subject 2: 'plan parenthood'
Solution:
be founder of