Complex sentence: During her marriage she made the acquaintance of the most eminent scientific men of the time, among whom her talents had attracted attention before she had acquired general fame, Laplace told her There have been only three women who have understood me.
Split into simpler sentences: During her marriage she made the acquaintance of the most eminent scientific men of the time, among whom her talents had attracted attention. Before she had acquired general fame, Laplace told her There have been only three women who have understood me.