Complex sentence: There is evidence suggesting that he composed a cantata as an audition piece for Mühlhausen, and one or two surviving cantatas may have been composed while Bach was at his previous post in Arnstadt, for example,.
Split into simpler sentences: There is evidence suggesting that he composed a cantata as an audition piece for Mühlhausen, and this may have been. One or two more surviving cantatas may have been composed while Bach was at his previous post in Arnstadt, for example,.