A man in a hat and brown shirt rides a bike.
The shirt is dirty
Just because riding a bike does not mean the shirt is dirty.
exists e1 s1 x1 x2 x3 x4 x5.(Theme(e1,x5) & Actor(e1,x1) & v_ride(e1) & n_bike(x5) & in(x1,x2) & n_shirt(x4) & a_brown(s1) & Theme(s1,x4) & n_hat(x3) & subset_of(x4,x2) & subset_of(x3,x2) & n_man(x1))
exists s1 x1.(n_shirt(x1) & Theme(s1,x1) & a_dirty(s1))