Many shoppers are walking around in a mall.
The shoppers are strolling the mall.
To be strolling is to be walking.
exists e1 p1 x1 x2.(in(e1,x2) & n_mall(x2) & exists s1.(Theme(s1,x1) & a_around(s1)) & Topic(e1,p1) & Actor(e1,x1) & v_walk(e1) & n_shopper(x1) & n_quantity(x1))
exists e1 x1 x2.(n_mall(x2) & n_shopper(x1) & Theme(e1,x2) & Actor(e1,x1) & v_stroll(e1))