A musician playing a keyboard in a concert.
The musician has never played the keyboard
If a musician has never played the keyboard it is not likely that the musician would be playing it in a concert.
exists e1 x1 x2 x3 x4.(a_topic(x1) & in(e1,x4) & n_concert(x4) & Theme(e1,x3) & Actor(e1,x2) & v_play(e1) & n_keyboard(x3) & (x1 = x2) & n_musician(x1))
exists e1 s1 x1 x2.(n_keyboard(x2) & n_musician(x1) & a_never(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1))