Complex sentence: As with her relationship with Mendelssohn, there has been some conjecture about a love affair; there is no conclusive evidence of that, but there is no doubt that Chopin admired her greatly, Douël, Martial, trans. M. D. Herter Norton.
Split into simpler sentences: As with her relationship with Mendelssohn, there has been some conjecture about a love affair. While there is no conclusive evidence of that, there is no doubt that Chopin admired her greatly, Douël, Martial, trans. M. D. Herter Norton.