The man is playing a stringed instrument on the ground.
There is a man playing a violin.
Violin is not the only stringed instrument
exists e1 s1 x1 x2 x3.(n_ground(x3) & n_man(x1) & on(e1,x3) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_instrument(x2) & a_stringed(s1) & Theme(s1,x2))
exists p1 x1 e1 x2 x3 x4.((x1 = x2) & Theme(e1,x4) & Actor(e1,x3) & v_play(e1) & n_violin(x4) & (x2 = x3) & n_man(x2))