A group of musicians are playing instruments as the leader leads them.
No one who is shown has ever played an instrument, not even once.
The group can not be a musicians if they have not ever played an instrument.
exists e1 p1 x1 x2 x3 x4.(n_leader(x4) & exists e2.(Theme(e2,x1) & Actor(e2,x4) & v_lead(e2)) & n_thing(x1) & as(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_play(e1) & n_instrument(x3) & of(x1,x2) & n_musician(x2) & n_group(x1))
--exists e1 e2 s1 x1 x2 x3 x4.(a_ever(s1) & Manner(e2,s1) & r_even(e2) & card_eq_1(x4) & n_time(x4) & Frequency(e2,x4) & Theme(e2,x3) & Actor(e2,x1) & v_play(e2) & n_instrument(x3) & Theme(e1,x2) & v_show(e1) & (x1 = x2) & n_one(x1))