Complex sentence: During the summer transfer window Sise signed for local rivals Halmstads BK, making his debut against GIF Sundsvall on 24 October 2008, the game ending 0-0.
Split into simpler sentences: During the summer transfer window Sise signed for local rivals Halmstads BK. He made his debut for Halmstads BK against GIF Sundsvall on 24 October 2008, the game ending 0-0.