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:
| Date | Visitor | Score | Home | Record |
| --- | --- | --- | --- | --- |
| April 12 | New York Rangers | 4–1 | Chicago Black Hawks | 0-1 |
| April 15 | New York Rangers | 4–5 | Chicago Black Hawks | 1-1 |
| April 17 | Chicago Black Hawks | 2–1 | New York Rangers | 2-1 |
| April 19 | Chicago Black Hawks | 3–1 | New York Rangers | 3-1 |
| April 24 | New York Rangers | 1–4 | Chicago Black Hawks | 4-1 |
Question:
What is Date, when Record is "1-1"?
Answer:
April 15