An elderly man drives a unique firetruck.
An elderly man is driving a unique firetruck in a parade.
A man can drive a firetruck to put out a fire not just a parade.
exists e1 s1 s2 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_firetruck(x2) & a_unique(s2) & Theme(s2,x2) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))
exists e1 s1 s2 x1 x2 x3.(in(e1,x3) & n_parade(x3) & Theme(e1,x2) & Actor(e1,x1) & v_drive(e1) & n_firetruck(x2) & a_unique(s2) & Theme(s2,x2) & n_man(x1) & a_elderly(s1) & Theme(s1,x1))