SELECT e_user.name
	FROM e_user
			INNER JOIN r_posts    ON (e_user._id      = r_posts.s_id)
			INNER JOIN e_tweet    ON (r_posts.d_id    = e_tweet._id)
			INNER JOIN r_contains ON (e_tweet._id     = r_contains.s_id)
			INNER JOIN e_link     ON (r_contains.s_id = e_link._id)
	GROUP BY e_user._id;