Task: NL2SQL (source dataset: WikiSQL)

Natural language to SQL, also known as NL2SQL, is the problem of generating a SQL query that can be executed on a input table, for a given natural language question.

You will be given an input table called "table" in the markdown format, as well as a question. Your task is to generate an SQL query that can be executed on the input table to answer the question.

Please ensure that the generated SQL only return relevant columns being specifically asked in the question (e.g., in SQL please don't return more than one columns in SELECT if only one column is needed to answer the given question, and similarly please refrain from using SELECT * unless the entire row is needed to answer the question).
 
When generating SQL code, please use the SQLite syntax to ensure that your SQL is executable on SQLite3. Use only columns that are present in the table, always use quotes around your column and table names (some column names have punctuation or special characters), and refer to the columns using the column-names exactly as they appear in the table, do not add or remove punctuation (underscore, slash, etc.)

No explanation, return the code only with the following markdown codeblock format : ```sql<SQL CODE>```. For example, ```sql
SELECT * FROM "table"
``` is a valid format.

Table:
| Year    | Men's singles      | Women's singles   | Men's doubles                               | Women's doubles                   | Mixed doubles                            |
|:--------|:-------------------|:------------------|:--------------------------------------------|:----------------------------------|:-----------------------------------------|
| 1922    | arthur evans snell | c. a. boone       | p. c. g. campbell h. l. lafferty            | c. a. boone r. george             | p. c. g. campbell mrs. p. c. g. campbell |
| 1923    | cowan mctaggart    | marcelle brunet   | cowan mctaggart g. h. gorges                | c. a. boone r. george             | g. h. gorges mrs. w. m. stewart          |
| 1924    | h. t. douglas      | esme f. coke      | arthur evans snell william m. stewart       | c. a. boone esme f. coke          | william m. stewart mrs. w. m. stewart    |
| 1925    | cowan mctaggart    | esme f. coke      | cowan mctaggart jack underhill              | c. a. boone esme f. coke          | j. kennedy esme f. coke                  |
| 1926    | c. walter aikman   | esme f. coke      | reginald h. hill jack g. muir               | c. a. boone esme f. coke          | jack g. muir eileen george               |
| 1927    | c. walter aikman   | eileen george     | jack g. muir jack underhill                 | h. partington esme f. coke        | c. walter aikman k. archibald            |
| 1928    | jack underhill     | esme f. coke      | g. blackstock cyril k. f. andrews           | c. a. boone esme f. coke          | c. walter aikman k. archibald            |
| 1929    | jack purcell       | esme f. coke      | jack g. muir noel radford                   | v. mill eileen george             | jack underhill eileen george             |
| 1930    | jack purcell       | yvette porteous   | g. blackstock cyril k. f. andrews           | j. woodman eileen george          | jack underhill eileen george             |
| 1931    | jack m. taylor     | ruth robertson    | g. blackstock cyril k. f. andrews           | marjorie barrow margaret delage   | jack underhill eileen george             |
| 1932    | jack underhill     | anna keir         | jack underhill noel radford                 | marjorie barrow margaret delage   | noel radford anna keir                   |
| 1933    | doug grant         | ruth robertson    | m. burrows d. mckean                        | e. w. whittington n. crossley     | george goodwin jr. margaret robertson    |
| 1934    | doug grant         | anna patrick      | bev mitchell george goodwin jr.             | marjorie barrow margaret delage   | dick birch anna patrick                  |
| 1935    | rod g. phelan      | margaret taylor   | jack sibbald l. coles                       | margaret robertson ruth robertson | george goodwin jr. margaret robertson    |
| 1936    | doug grant         | dorothy walton    | e. laney jack underhill                     | margaret robertson ruth robertson | dick birch anna patrick                  |
| 1937    | dick birch         | anna patrick      | jack sibbald joe zaharko                    | anna patrick vess o'shea          | dick birch anna patrick                  |
| 1938    | john samis         | dorothy walton    | jack sibbald rod g. phelan                  | margaret taylor vess o'shea       | len schlemm n. bonnar                    |
| 1939    | dick birch         | marjorie delaney  | jack sibbald rod g. phelan                  | margaret taylor vess o'shea       | dick birch vess o'shea                   |
| 1940    | jim snyder         | dorothy walton    | jim snyder paul snyder                      | dorothy walton evelyn effnert     | dick birch vess o'shea                   |
| 1941/46 | no competition     | no competition    | no competition                              | no competition                    | no competition                           |
| 1947    | john samis         | claire lovett     | jack underhill john samis                   | claire lovett n. ma               | dick birch barb ince                     |
| 1948    | dick birch         | claire lovett     | frederick hughes (ted) pollock roy g. smith | m. armstrong ethel marshall       | dick birch ev roberts                    |
| 1949    | john samis         | marjorie mapp     | t. darryl thompson k. meredith              | claire lovett jean bardsley       | t. darryl thompson jean bardsley         |
| 1950    | alan williams      | lois reid         | grant henry dorren clapperton               | ev roberts joan hennessy          | dick birch ev roberts                    |
| 1951    | t. darryl thompson | kay ottonson      | dick birch gordon simpson                   | lois reid jean bardsley           | t. darryl thompson jean bardsley         |
| 1952    | donald smythe      | marjorie mapp     | donald smythe budd porter                   | barb ince joan warren             | budd porter ethel marshall               |
| 1953    | donald smythe      | marjory shedd     | donald smythe budd porter                   | lois reid jean bardsley           | dick birch barb ince                     |
| 1954    | donald smythe      | marjory shedd     | donald smythe william purcell               | marjory shedd joan hennessy       | t. darryl thompson jean bardsley         |
| 1955    | donald smythe      | jean waring       | t. darryl thompson bert fergus              | marjory shedd joan hennessy       | t. darryl thompson jean bardsley         |
| 1956    | david mctaggart    | jean miller       | beverley westcott william purcell           | marjory shedd joan hennessy       | william purcell marjory shedd            |

Question: Who played mixed doubles when Anna Keir played women's singles?

table_id: 2-13845918-1
label: SELECT "Mixed doubles" FROM "table" WHERE "Women''s singles" = "anna keir"