A man carries a red umbrella while walking.
The man  is carrying an umbrella.
A man carrying a red umbrella means that the man carries a red umbrella.
exists e2 e1 s1 x1 x2.(while(e1,e2) & Actor(e2,x1) & v_walk(e2) & Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & n_umbrella(x2) & a_red(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2.(n_man(x1) & Theme(e1,x2) & Actor(e1,x1) & v_carry(e1) & n_umbrella(x2))