A black man leans over as a white man jumps on his back backwards.
Two men are doing acrobatics.
A black man leans over as a white man jumps on his back backwards but they may not doing acrobatics.
exists s1 s2 s3 s4 x1 x2 x3 x4 x5.(as(s2,x3) & on(x3,x5) & n_backward(x5) & a_back(s4) & Theme(s4,x5) & of(x5,x1) & n_male(x1) & n_jump(x3) & of(x3,x4) & n_man(x4) & a_white(s3) & Theme(s3,x3) & Theme(s2,x1) & a_over(s2) & n_lean(x1) & of(x1,x2) & n_man(x2) & a_black(s1) & Theme(s1,x1))
exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_do(e1) & n_acrobatics(x2) & n_man(x1) & card_eq_2(x1))