Question: Who is the maternal grandmother of Eustace Iii, Count Of Boulogne?
Sentence (from "Eustace III, Count of Boulogne"): Eustace was at first uninterested, but was convinced to accept it; he travelled all the way to Apulia before learning that a distant relative, Baldwin of Bourcq, had been crowned in the meantime.
Relevant evidence: No