Street vendor in Europe sells to several elderly people.
Elderly people buy from street vendors.
If the vendor sells to elderly then you can also say that the elderly buy for the vendors.
exists e1 s1 s2 x1 x2 x3 x4.(ne_geo_europe(x3) & to(e1,x4) & n_people(x4) & a_elderly(s2) & Theme(s2,x4) & a_several(s1) & Theme(s1,x4) & Actor(e1,x1) & v_sell(e1) & in(x1,x3) & n_vendor(x1) & (x1 = x2) & ne_org_street(x2))
exists e1 s1 x1 x2 x3.(from(e1,x2) & n_vendor(x2) & of(x2,x3) & n_street(x3) & Actor(e1,x1) & v_buy(e1) & n_people(x1) & a_elderly(s1) & Theme(s1,x1))