Complex sentence: Robertson had met a French-Canadian girl on the Paris stop of Dylan's 1966 world tour who had become his girlfriend, (source?) and the two moved into a house on Dylan manager Albert Grossman's estate in the Woodstock area.
Split into simpler sentences: Robertson had met a French-Canadian girl on the Paris stop of Dylan's 1966 world tour who had since become his girlfriend. The two moved into a house on Dylan manager Albert Grossman's estate in the Woodstock area.