user
Instruction
Answer the question based on the provided table.


Table
Table Title: List of defunct National Basketball Association teams
Table Content:
| Team | City | Years active | Seasons played | Win–loss record | Win% | Playoffs appearances |
| --- | --- | --- | --- | --- | --- | --- |
| Anderson Packers | Anderson, Indiana | 1949–1950 | 1 | 37–27 | .578 | 1 |
| BAA Buffalo | Buffalo, New York | Never Played | 0 | 0–0 | N/A | 0 |
| BAA Indianapolis | Indianapolis, Indiana | Never Played | 0 | 0–0 | N/A | 0 |
| Baltimore Bullets* | Baltimore, Maryland | 1947–1954 | 8 | 158–292 | .351 | 3 |
| Chicago Stags | Chicago, Illinois | 1946–1950 | 4 | 145–92 | .612 | 4 |
| Cleveland Rebels | Cleveland, Ohio | 1946–1947 | 1 | 30–30 | .500 | 1 |
| Denver Nuggets | Denver, Colorado | 1949–1950 | 1 | 11–51 | .177 | 0 |
| Detroit Falcons | Detroit, Michigan | 1946–1947 | 1 | 20–40 | .333 | 0 |
| Indianapolis Jets | Indianapolis, Indiana | 1948–1949 | 1 | 18–42 | .300 | 0 |
| Indianapolis Olympians | Indianapolis, Indiana | 1949–1953 | 4 | 132–137 | .491 | 4 |
| Pittsburgh Ironmen | Pittsburgh, Pennsylvania | 1946–1947 | 1 | 15–45 | .250 | 0 |
| Providence Steamrollers | Providence, Rhode Island | 1946–1949 | 3 | 46–122 | .274 | 0 |
| Sheboygan Red Skins | Sheboygan, Wisconsin | 1949–1950 | 1 | 22–40 | .355 | 1 |
| St. Louis Bombers | St. Louis, Missouri | 1946–1950 | 4 | 122–115 | .515 | 3 |
| Toronto Huskies | Toronto, Ontario | 1946–1947 | 1 | 22–38 | .367 | 0 |
| Washington Capitols | Washington, D.C. | 1946–1951 | 5 | 157–114 | .579 | 4 |
| Waterloo Hawks | Waterloo, Iowa | 1949–1950 | 1 | 19–43 | .306 | 0 |


Question
how many teams became defunct before 1950?


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["6"]