FROM FactPerson FP
JOIN FactCrash FC ON FP.CrashSK = FC.CrashPK
JOIN DimHWYType DHT ON DHT.HWYTypeCode = FC.HighwayTypeCode
JOIN FactVehicle FV ON FV.CrashSK = FC.CrashPK
JOIN DimVehicleType DVT ON DVT.VehicleTypeCode = FV.VehicleTypeCode
WHERE (FC.HighwayTypeCode = 'A' OR FC.HighwayTypeCode = 'B' OR FC.HighwayTypeCode = 'C')
AND (FV.VehicleTypeCode = 'A' OR FV.VehicleTypeCode = 'B' OR FV.VehicleTypeCode = 'S')
AND (FP.Age, FP.PersonType) IN
    (SELECT FP.Age, FP.PersonType
    FROM FactPerson FP
    WHERE (FP.PersonType = 'A')
    AND (FP.Age BETWEEN 18 AND 21))