A man driving a custom made firetruck.
He runs alongside the firetruck
You cannot be both driving and running at the same time
exists e1 e2 x1 x2 x3 x4.(a_topic(x1) & Theme(e2,x3) & Actor(e2,x2) & v_drive(e2) & n_firetruck(x3) & Theme(e1,x3) & v_make(e1) & of(x3,x4) & n_custom(x4) & (x1 = x2) & n_man(x1))
exists e1 x1 x2.(n_firetruck(x2) & n_male(x1) & alongside(e1,x2) & Actor(e1,x1) & v_run(e1))