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:
| Number | Serial Number | Into Service | Withdrawn | Scrapped |
| --- | --- | --- | --- | --- |
| DH1 | 573.0 | 4/1962 | Example | 2004 |
| DH2 | 574.0 | 4/1962 | Example | Feb 1994 |
| DH3 | 575.0 | Example | Example | Oct 1997 |
| DH4 | 579.0 | Example | Example | Sep 1997 |
| DH5 | 580.0 | Example | Example | Sep 1997 |
Question:
Name the into service for dh1
Answer:
4/1962