Complex sentence: Assis started his career 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 SC Lourinhanense.
Split into simpler sentences: Assis started his career in his hometown Lousã, before being spotted by Sporting Clube de Portugal. He moved to the Lisbon club's youth system, and later was loaned to its satellite club SC Lourinhanense.