Complex sentence: Andrews then scored sporadically until he tallied his seventh win--and his last with 24 Squadron--on 22 November 1916 when he shot down German double ace Stefan Kirmaier, Staffelführer of Jasta 2.
Split into simpler sentences: Andrews then scored sporadically until he tallied his seventh win--and his last with 24 Squadron--on 22 November 1916. On that day, Andrews shot down German double ace Stefan Kirmaier, Staffelführer of Jasta 2.