Complex sentence: The Communist period from 1948 to 1989 was marked by oppression of Catholic church, which has traditionally strong presence in Nitra, but also extensive growth, housing projects and annexing of formerly independent villages.
Split into simpler sentences: The Communist period from 1948 to 1989 was marked by oppression of Catholic church, which has traditionally strong presence in Nitra. This period experienced the extensive growth, building the housing projects and annexing of formerly independent villages.