The man wearing the purple shirt is in the shadows.
man sailing boat
Sailing a boat cannot be done from the shadows.
exists e1 p1 s1 x1 x2 x3 x4.(n_shadow(x4) & n_shirt(x3) & a_purple(s1) & Theme(s1,x3) & n_man(x1) & in(x1,x4) & Theme(e1,x3) & Actor(e1,x2) & v_wear(e1) & (x1 = x2))
exists x1 x2 x3.(n_boat(x1) & of(x1,x3) & n_sailing(x3) & of(x1,x2) & n_man(x2) & a_topic(x1))