Complex sentence: This mentality can also be seen in the Greeks' tendency to reproduce and copy only literature that was deemed the "best", in the Olympic games, and in literature, with competitions in poetry, tragedy, and comedy.
Split into simpler sentences: This mentality can also be seen in the Greeks' tendency to reproduce and copy only the literature that was deemed the "best"; the Olympic games were also products of this mentality. Moreover, this carried over into literature itself, with competitions in poetry, tragedy, and comedy.