The man is playing a stringed instrument on the ground.
The man is playing a guitar.
Stringed instrument can be violin, guitar, sitar or anything
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 e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_guitar(x2))