Extension:Wikispeech/wikispeech utterance table

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    |                |
+----------------------+------------------+------+-----+---------+----------------+