Complex sentence: A companion, "Straton" is mentioned in the same capacity, he was also a companion of Cleisthenes in "The Acharnians" and he is mentioned again in "The Birds" "Birds" line 942.
Split into simpler sentences: A companion, "Straton" is mentioned in the same capacity. Straton was also a companion of Cleisthenes in "The Acharnians" and he is mentioned later in "The Birds" "Birds" line 942.