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:
| BRNo. | Name | Builder | Whenbuilt | Withdrawn |
| --- | --- | --- | --- | --- |
| 34071.0 | 601 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1967 |
| 34072.0 | 257 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1964 |
| 34073.0 | 249 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1964 |
| 34074.0 | 46 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1963 |
| 34075.0 | 264 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1964 |
| 34076.0 | 41 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1966 |
| 34077.0 | 603 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1967 |
| 34078.0 | 222 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1964 |
| 34079.0 | 141 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1966 |
| 34080.0 | 74 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1964 |
| 34081.0 | 92 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1964 |
| 34082.0 | 615 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1966 |
| 34083.0 | 605 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1964 |
| 34084.0 | 253 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1965 |
| 34085.0 | 501 Squadron | Eastleigh | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1965 |
| 34086.0 | 219 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1966 |
| 34087.0 | 145 Squadron | Eastleigh | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1967 |
| 34088.0 | 213 Squadron | Brighton | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1967 |
| 34089.0 | 602 Squadron | Eastleigh | Cannot handle non-empty timestamp argument! 1948 | Cannot handle non-empty timestamp argument! 1967 |
| 34090.0 | Sir Eustace Missenden, Southern Railway | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1967 |
| 34091.0 | Weymouth | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1964 |
| 34092.0 | City of Wells | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1964 |
| 34093.0 | Saunton | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1967 |
| 34094.0 | Mortehoe | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1964 |
| 34095.0 | Brentor | Eastleigh | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1967 |
| 34096.0 | Trevone | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1964 |
| 34097.0 | Holsworthy | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1967 |
| 34098.0 | Templecombe | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1967 |
| 34099.0 | Lynmouth | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1964 |
| 34100.0 | Appledore | Brighton | Cannot handle non-empty timestamp argument! 1949 | Cannot handle non-empty timestamp argument! 1967 |
| 34101.0 | Hartland | Eastleigh | Cannot handle non-empty timestamp argument! 1950 | Cannot handle non-empty timestamp argument! 1966 |
| 34102.0 | Lapford | Eastleigh | Cannot handle non-empty timestamp argument! 1950 | Cannot handle non-empty timestamp argument! 1967 |
| 34103.0 | Calstock | Brighton | Cannot handle non-empty timestamp argument! 1950 | Cannot handle non-empty timestamp argument! 1965 |
| 34104.0 | Bere Alston | Eastleigh | Cannot handle non-empty timestamp argument! 1950 | Cannot handle non-empty timestamp argument! 1967 |
| 34105.0 | Swanage | Brighton | Cannot handle non-empty timestamp argument! 1950 | Cannot handle non-empty timestamp argument! 1964 |
| 34106.0 | Lydford | Brighton | March 1950 | September 1964 |
| 34107.0 | Blandford Forum | Brighton | April 1950 | September 1964 |
| 34108.0 | Wincanton | Brighton | April 1950 | June 1967 |
| 34109.0 | Sir Trafford Leigh-Mallory | Brighton | May 1950 | September 1964 |
| 34110.0 | 66 Squadron | Brighton | January 1951 | November 1963 |
Question:
What is the whenbuilt of the Brighton built Blandford Forum with a withdrawn of september 1964?
Answer:
April 1950