A man in a striped shirt is taking a picture while a man rides a bike behind him.
A man is taking pictures of the birds.
A man taking a picture could be taking pictures of something other than birds.
exists e1 p1 s1 x1 x2 x3.(exists e2 x4 x5.(Theme(e2,x5) & Actor(e2,x4) & v_ride(e2) & behind(x5,x1) & n_bike(x5) & n_man(x4)) & n_male(x1) & while(e1,p1) & Theme(e1,x3) & Actor(e1,x1) & v_take(e1) & n_picture(x3) & in(x1,x2) & n_shirt(x2) & a_striped(s1) & Theme(s1,x2) & n_man(x1))
exists e1 x1 x2 x3.(n_bird(x3) & Theme(e1,x2) & Actor(e1,x1) & v_take(e1) & of(x2,x3) & n_picture(x2) & n_man(x1))