[tag=IN] [tag=VBG] [lemma=and] [□] □
[tag=IN] [tag=VBG] [lemma=and] [□=□] □
[tag=IN] [tag=VBG] [lemma=and] [□ & □] □
A select musical performing ensemble composed of 40 to 70 members devoted to learning and performing works from the vast repertory of choral music from all historical periods and styles ; several performances , occasionally with orchestra , each semester on and off campus .