Two friends are walking down the street engaged in a lively conversation.
the man rollerbladed down the ramp
One cannot walk and rollerblade down a ramp at the same time.
exists e2 e1 s1 x1 x2 x3 x4.(n_street(x2) & down(e1,x2) & in(e2,x4) & n_conversation(x4) & a_lively(s1) & Theme(s1,x4) & Theme(e2,x3) & v_engage(e2) & (x2 = x3) & Actor(e1,x1) & v_walk(e1) & n_friend(x1) & card_eq_2(x1))
exists e1 s1 x1 x2.(n_ramp(x2) & n_man(x1) & a_down(s1) & Manner(e1,s1) & Theme(e1,x2) & Actor(e1,x1) & v_rollerblade(e1))