Complex sentence: Butterflies (van Gogh) are paintings made by Vincent van Gogh in 1889 and 1890 made of at least four paintings of butterflies and one of a moth.
Split into simpler sentences: Butterflies (van Gogh) are paintings made by Vincent van Gogh in 1889 and 1890. Van Gogh made at least four paintings of butterflies and one of a moth.