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:
| Yard Name | Location (city, state) | 1st Ship Delivery Date | Ship Types Delivered | Total Number of Ways | total vessels built |
| --- | --- | --- | --- | --- | --- |
| Moore Dry Dock Company | Oakland, California | July 1940 | C2 type, R2 type, C3 type | 4 ways | __ ships for USMC (remainder for USN) |
| Bethlehem Steel Corp. | San Francisco, California | February 1941 | C1 type | number | 5 ships for USMC (remainder for USN) |
| Seattle-Tacoma Shipbuilding | Tacoma, Washington | April 1941 | C1 type, C3 type, T1 type | 8 ways | __ ships for USMC (remainder for USN) |
| Western Pipe & Steel Corp. | South San Francisco, California | April 1941 | C1 type, C3 type | 4 ways | __ ships for USMC |
| Kaiser Permanente (Richmond yard #1) | Richmond, California | August 1941 | British Ocean type, EC2 type, VC2 type | 7 ways | 30 ships for UK, __ ships for USMC |
| Kaiser Permanente (Richmond yard #2) | Richmond, California | September 1941 | EC2 type, VC2 type | 12 ways | __ ships for USMC |
| Oregon Shipbuilding Co. | Portland, Oregon | January 1942 | EC2 type, VC2 type | 11 ways | __ ships for USMC |
| California Shipbuilding Corp. (CalShip) | Terminal Island, Los Angeles, California | February 1942 | EC2 type, VC2 type | 14 ways | __ ships for USMC |
| MarinShip Corp. | Sausalito, California | October 1942 | EC2 type, T2 type | 6 ways | __ ships for USMC |
| Pacific Bridge Co. | Alameda, California | December 1942 | N3 type | 2 ways (basins) | 9 ships for USMC (remainder for USN) |
| Kaiser Company, Inc. | Swan Island, Portland, Oregon | December 1942 | T2 type | 8 ways | __ ships for USMC |
| Kaiser Cargo (Richmond yard #4) | Richmond, California | April 1943 | S2 (LST) type, S2 (frigate) type, C1-M type | 3 ways | __ ships for USMC |
| Kaiser Shipbuilding (Richmond yard #3) | Richmond, California | August 1943 | C4 type | 5 ways (basins) | __ ships for USMC |
Question:
What was the delivery date when s2 (lst) type, s2 (frigate) type, c1-m type was delivered?
Answer:
April 1943