mysql> describe wikispeech_utterance;
+----------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+------------------+------+-----+---------+----------------+
| wsu_utterance_id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| wsu_remote_wiki_hash | binary(64) | YES | MUL | NULL | |
| wsu_page_id | int(10) unsigned | NO | | NULL | |
| wsu_lang | varbinary(35) | NO | MUL | NULL | |
| wsu_seg_hash | binary(64) | NO | | NULL | |
| wsu_voice | varbinary(30) | NO | | NULL | |
| wsu_date_stored | binary(14) | NO | MUL | NULL | |
+----------------------+------------------+------+-----+---------+----------------+
