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 | Award | Category | Nominee | Result |
| --- | --- | --- | --- | --- |
| 1975.0 | Tony Award | Best Musical | Best Musical | Nominated |
| 1975.0 | Tony Award | Best Book of a Musical | Michael Stewart | Nominated |
| 1975.0 | Tony Award | Best Performance by a Leading Actor in a Musical | Robert Preston | Nominated |
| 1975.0 | Tony Award | Best Performance by a Leading Actress in a Musical | Bernadette Peters | Nominated |
| 1975.0 | Tony Award | Best Scenic Design | Robin Wagner | Nominated |
| 1975.0 | Tony Award | Best Costume Design | Patricia Zipprodt | Nominated |
| 1975.0 | Tony Award | Best Choreography | Gower Champion | Nominated |
| 1975.0 | Tony Award | Best Direction of a Musical | Gower Champion | Nominated |
| 1975.0 | Drama Desk Award | Outstanding Actor in a Musical | Robert Preston | Nominated |
| 1975.0 | Drama Desk Award | Outstanding Actress in a Musical | Bernadette Peters | Nominated |
| 1975.0 | Drama Desk Award | Outstanding Music | Jerry Herman | Nominated |
| 1975.0 | Drama Desk Award | Outstanding Lyrics | Jerry Herman | Nominated |
Question:
Which category was Michael Stewart a nominee in?
Answer:
Best Book of a Musical