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 | Type | Record description | Achievement | Pilot |
| --- | --- | --- | --- | --- |
| 23 September 1961 | Mi-10 | Altitude with kg (lb) payload | m (ft) | G.V. Alfyorov |
| 23 September 1961 | Mi-10 | Maximum load to m (ft) | kg (lb) | B.V. Zemskov |
| 26 May 1965 | Mi-10R | Altitude with kg (lb) payload | m (ft) | V.P. Koloshenko |
| 28 May 1965 | Mi-10R | Altitude with kg (lb) / kg (lb) payload | m (ft) | V.P. Koloshenko |
| 28 May 1965 | Mi-10R | Altitude with kg (lb) payload | m (ft) | G.V. Alfyorov |
| 28 May 1965 | Mi-10R | Maximum load to m (ft) | kg (lb) | G.V. Alfyorov |
Question:
Pilot of g.v. alfyorov, and a Record description of altitude with kg (lb) payload, and a Type of mi-10 involved what date?
Answer:
23 September 1961