A group of friends talk around a table.
Friends having a conversation at the table.
A group of friends implies that the people talking are all friends, meaning that friends is an appropriate replacement for group of friends; additionally, having a conversation implies that the friends talk.
exists e1 x1 x2 x3.(around(e1,x3) & n_table(x3) & Actor(e1,x1) & v_talk(e1) & of(x1,x2) & n_friend(x2) & n_group(x1))
exists e1 x1 x2 x3.(n_table(x3) & Theme(e1,x2) & Actor(e1,x1) & v_have(e1) & at(x2,x3) & n_conversation(x2) & n_friend(x1))