Complex sentence: On 28 February 2013, Paton signed for Queen of the South until the end of the season, having been on trial at the club and played three time in the reserve as a trialist.
Split into simpler sentences: On 28 February 2013 Paton signed for Queen of the South until the end of the season. Paton had been on trial at the club and had played three times in the reserves as a trialist.