These three people are playing instruments while sitting in front of sheet music stands.
A group plays a song they aren't very familiar with.
These people aren't necessarily a group, and they aren't necessarily playing a song they aren't very familiar with.
exists e2 e1 e3 x1 x2 x3 x4 x5 x6.(n_people(x1) & card_eq_3(x1) & while(e1,e2) & in(e2,x3) & of(x3,x4) & Actor(e3,x6) & v_stand(e3) & (x4 = x6) & n_music(x4) & of(x4,x5) & n_sheet(x5) & n_front(x3) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & -exists s1 x3.(r_very(s1) & with(s1,x3) & (x2 = x3) & Theme(s1,x1) & a_familiar(s1)) & n_thing(x1) & n_song(x2) & n_group(x1))