Complex sentence: In June 1890, he painted several portraits of the doctor, including "Portrait of Dr. Gachet", and his only etching; in each, the emphasis is on Gachet's melancholic disposition.
Split into simpler sentences: In June 1890, he painted several portraits of his doctor, including "Portrait of Dr. Gachet", and his only etching. In each the emphasis is on Gachet's melancholic disposition.