A kid running thought a water while having fun.
an old man in a wheelchair.
A kid cannot be an old man. Someone is a wheelchair is unable to run.
exists e2 e3 e1 x1 x2 x3 x4.(while(e2,e3) & Theme(e3,x4) & Actor(e3,x1) & v_have(e3) & n_fun(x4) & Theme(e2,x3) & Actor(e2,x1) & v_think(e2) & n_water(x3) & Actor(e1,x2) & v_run(e1) & (x1 = x2) & n_kid(x1))
exists s1 x1 x2.(a_topic(x1) & in(x1,x2) & n_wheelchair(x2) & n_man(x1) & a_old(s1) & Theme(s1,x1))