Many people have gathered to protest the government.
A large group is protesting.
Many people and a large group of people are synonymous phrases.
exists e1 p1 x1 x2.(n_government(x2) & Topic(e1,p1) & Actor(e1,x1) & v_gather(e1) & exists e2.(Theme(e2,x2) & Actor(e2,x1) & v_protest(e2)) & n_people(x1) & n_quantity(x1))
exists e1 s1 x1.(Actor(e1,x1) & v_protest(e1) & n_group(x1) & a_large(s1) & Theme(s1,x1))