Divide and conquer.
D018480:Astronauts / Q000191:economics; D002017:Budgets / Q000331:legislation & jurisprudence; D035082:Federal Government; D017149:Private Sector / Q000191:economics*; D055818:Public-Private Sector Partnerships / Q000191:economics / Q000639:trends; D013026:Space Flight / Q000191:economics* / Q000639:trends*; D018531:Spacecraft / Q000191:economics*; D014481:United States; D018557:United States National Aeronautics and Space Administration / Q000191:economics / Q000639:trends*