The speaker is introducing the new products on a fair.
a speaker does not like the products he presents
Introducing products does not imply to not like the products.
exists e1 s1 x1 x2 x3.(n_product(x2) & a_new(s1) & Theme(s1,x2) & n_speaker(x1) & on(e1,x3) & n_fair(x3) & Theme(e1,x2) & Actor(e1,x1) & v_introduce(e1))
exists x1 x2.(n_male(x2) & n_product(x2) & -exists e1 e2 x3.(Theme(e2,x2) & Actor(e2,x1) & v_like(e2) & Theme(e1,x3) & Actor(e1,x2) & v_present(e1) & (x2 = x3)) & n_speaker(x1))