Complex sentence: Others suggest the female was the model known as'Red Hilda'; she bears strong resemblance to the model in his "Woman with feather boa", "Goldfish" and "Danaë".
Split into simpler sentences: Others suggest the female was a model known as'Red Hilda.' There is strong visual evidence that the same female model sat for "Woman with feather boa", "Goldfish" and "Danaë".