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:
| Episode title | Subject | Music by | Lyrics by | Performed by | First aired |
| --- | --- | --- | --- | --- | --- |
| Elbow Room | U.S. territorial expansion | Lynn Ahrens | Lynn Ahrens | Sue Manchester | 1975 |
| Fireworks | Declaration of Independence | Lynn Ahrens | Lynn Ahrens | Grady Tate | 1976 |
| The Great American Melting Pot | Immigration / Diversity | Lynn Ahrens | Lynn Ahrens | Lori Lieberman | 1977, or May 1, 1976 |
| I'm Just a Bill | Legislative Process | Dave Frishberg | Dave Frishberg | Jack Sheldon | 1975 |
| No More Kings | American independence | Lynn Ahrens | Lynn Ahrens | Lynn Ahrens & Bob Dorough | 1975 |
| Preamble | United States Constitution | Lynn Ahrens | Lynn Ahrens | Lynn Ahrens | 1975 |
| The Shot Heard 'Round The World | American Revolutionary War | Bob Dorough | Bob Dorough | Bob Dorough | 1976 |
| Sufferin' 'til Suffrage | Women's suffrage | Bob Dorough | Tom Yohe | Essra Mohawk | 1976 |
| Three Ring Government | Separation of powers | Lynn Ahrens | Lynn Ahrens | Lynn Ahrens | 1979 |
| I'm Gonna Send Your Vote to College | Electoral College | George R. Newall and Bob Dorough | George R. Newall and Bob Dorough | Jack Sheldon and Bob Dorough | 2002 |
Question:
What is the date for the episode performed by Sue Manchester?
Answer:
1975.0