A man plays the guitar while sitting against a building.
There is a man and a guitar.
'A man plays the guitar ' is a rephrasing of ' there is a man and a guitar.
exists e2 e1 x1 x2 x3.(n_guitar(x2) & while(e1,e2) & against(e2,x3) & n_building(x3) & Actor(e2,x1) & v_sit(e2) & Theme(e1,x2) & Actor(e1,x1) & v_play(e1) & n_man(x1))
exists p1 x1 x2 x3 x4.((x1 = x2) & subset_of(x4,x2) & n_guitar(x4) & subset_of(x3,x2) & n_man(x3))