A man wearing a chef's coat is doing a demonstration for a group of people.
A guy dressed like an astronaut makes a cake for a single audience member.
A chef's coat is not what an astronaut wears.  A single audience member is not a group of people.
exists e2 e1 x1 x2 x3 x4 x5 x6 x7.(Theme(e2,x5) & Actor(e2,x1) & v_do(e2) & for(x5,x6) & of(x6,x7) & n_people(x7) & n_group(x6) & n_demonstration(x5) & Theme(e1,x4) & Actor(e1,x2) & v_wear(e1) & n_coat(x4) & of(x4,x3) & n_chef(x3) & (x1 = x2) & n_man(x1))
exists e2 e1 s1 x1 x2 x3 x4 x5 x6.(Theme(e2,x4) & Actor(e2,x1) & v_make(e2) & for(x4,x5) & n_member(x5) & of(x5,x6) & n_audience(x6) & a_single(s1) & Theme(s1,x5) & n_cake(x4) & like(e1,x3) & n_astronaut(x3) & Theme(e1,x2) & v_dress(e1) & (x1 = x2) & n_guy(x1))