A man in a brown shirt sitting down.
The man with the brown shirt is riding a bicycle.
A man cannot be riding something while sitting down.
exists e1 s1 s2 x1 x2 x3.(a_topic(x1) & in(x1,x2) & a_down(s2) & Manner(e1,s2) & Actor(e1,x3) & v_sit(e1) & (x2 = x3) & n_shirt(x2) & a_brown(s1) & Theme(s1,x2) & n_man(x1))
exists e1 s1 x1 x2 x3.(n_shirt(x2) & a_brown(s1) & Theme(s1,x2) & n_man(x1) & Theme(e1,x3) & Actor(e1,x1) & v_ride(e1) & n_bicycle(x3) & with(x1,x2))