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.

Sentence: 'Laurie King-Irani , a co-founder of the Electronic Intifada , is a social anthropologist and freelance writer living in Madrid , Spain .', Argument/Subject 1: 'laurie king-irani', Argument/Subject 2: 'electronic intifada'
be co-founder of