Man in a blue shirt and white hat cleaning a fountain.
Maintenance worker is working on the fountain.
A man is a blue shirt is not assumed to be a maintenance worker.
exists e1 s1 s2 x1 x2 x3 x4 x5 x6.(a_topic(x1) & Theme(e1,x6) & Actor(e1,x5) & v_clean(e1) & n_fountain(x6) & (x1 = x5) & in(x1,x2) & n_hat(x4) & a_white(s2) & Theme(s2,x4) & n_shirt(x3) & a_blue(s1) & Theme(s1,x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
exists e1 x1 x2 x3.(n_fountain(x3) & on(e1,x3) & Actor(e1,x1) & v_work(e1) & n_worker(x1) & of(x1,x2) & n_maintenance(x2))