Complex sentence: Assis started playing football in his hometown Lousã, before being spotted by Sporting Clube de Portugal; he then moved to the Lisbon club's youth system, and later was loaned to its feeder club Sporting Clube Lourinhanense.
Split into simpler sentences: Assis started playing football in his hometown of Lousã, before being spotted by Sporting Clube de Portugal. He then moved to the Lisbon club's youth system, and later was loaned to its feeder club Sporting Clube Lourinhanense.