Complex sentence: In 1967 Lee was among those who founded House of Anansi Press and was its first editor, holding that position for five years, and helping to build Anansi into the acclaimed publisher of poetry and literature that it is today.
Split into simpler sentences: In 1967 Lee was among those who founded House of Anansi Press and was its first editor, a position he held for five years. He helped to build Anansi into the acclaimed publisher of poetry and literature that it is today.