question: Which organizations were founded in 1950?
tokens: <var1> <tok> type <tok> organisation <dot> <var1> <tok> formation year <tok> <var2> <dot> <var1> <tok> founding year <tok> <var2> <dot> <var1> <tok> foundation <tok> <var2> <dot> <var1> <tok> formation <tok> <var2>