A person in a plaid shirt is laying on the ground taking a picture of a backpack which reads "vespa".
Nobody has a shirt.
It is established that the person is already wearing a plaid shirt so saying nobody had a shirt is contradictory.
exists e1 e3 e2 s1 x1 x2 x3 x4 x5 x6 x7 x8.(n_ground(x3) & on(e1,x3) & Theme(e3,x5) & Actor(e3,x4) & v_take(e3) & of(x5,x6) & Theme(e2,x8) & Actor(e2,x7) & v_read(e2) & n_vespa(x8) & (x6 = x7) & n_backpack(x6) & n_picture(x5) & (x3 = x4) & Actor(e1,x1) & v_lay(e1) & in(x1,x2) & n_shirt(x2) & a_plaid(s1) & Theme(s1,x2) & n_person(x1))
-exists e1 x1 x2.(Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & n_shirt(x2) & n_person(x1))