Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Title | Format | Label | Catalogno | Remark |
| --- | --- | --- | --- | --- | --- |
| 1970.0 | Bloodrock | 12"LP | CAPITOL | ST 435 | #160 US |
| 1971.0 | Bloodrock 2 | 12"LP | CAPITOL | ST 491 | #21 US [RIAA Certified Gold January 3, 1990] |
| 1971.0 | Bloodrock 3 | 12"LP | CAPITOL | ST 765 | #27 US |
| 1972.0 | Bloodrock U.S.A. | 12"LP | CAPITOL | SMAS 645 | #88 US |
| 1972.0 | Passage | 12"LP | CAPITOL | SW 11109 | #104 US |
| 1974.0 | Whirlwind Tongues | 12"LP | CAPITOL | SMAS 11259 | Did not chart |
Question:
Whati s the format for the catalogno of st 491?
Answer:
12"LP