### Database Schema:
CREATE TABLE tags (
	index	INTEGER	NULL	PRIMARY KEY,
	id	INTEGER	NULL,
	tag	TEXT	NULL,
	foreign key (id) references torrents (id)
);

CREATE TABLE torrents (
	groupName	TEXT	NULL,
	totalSnatched	INTEGER	NULL,
	artist	TEXT	NULL,
	groupYear	INTEGER	NULL,
	releaseType	TEXT	NULL,
	groupId	INTEGER	NULL,
	id	INTEGER	NULL	PRIMARY KEY
);

### User's Query:
Provide the name of artists who released at least two bootlegs in 2016.

### Extra Knowledge:
at least two bootlegs refer to COUNT(releaseType = 'bootleg')≥ 2; groupYear = 2016;
SELECT artist FROM torrents WHERE groupYear = 2016 AND releaseType LIKE 'bootleg' GROUP BY artist HAVING COUNT(releaseType) > 2