Complex sentence: The Patriots led 17-10 at halftime against the Broncos, however, the Broncos came back and held the Patriots to just three points in the second half and handed the Patriots their fourth loss of the year.
Split into simpler sentences: The Patriots led 17-10 at halftime against the Broncos. However; the Broncos came back and held the Patriots to just three points in the second half and handed the Patriots their fourth loss of the year.