An attractive girl sells things to boys.
The boys are heterosexual
We can not tell a persons sexual attraction from looking, the boys are not necessarily heterosexual.
exists e1 s1 x1 x2 x3.(to(e1,x3) & n_boy(x3) & Theme(e1,x2) & Actor(e1,x1) & v_sell(e1) & n_thing(x2) & n_girl(x1) & a_attractive(s1) & Theme(s1,x1))
exists s1 x1.(n_boy(x1) & Theme(s1,x1) & a_heterosexual(s1))