List the full name of players who are drafted from round 1 in 1973 but not born in USA.
full name refers to firstName, middleName, lastName; in 1973 refers to year = 1973; not born in USA refers to birthCountry <> 'USA'
SELECT T1.firstName, T1.middleName, T1.lastName FROM players AS T1 INNER JOIN draft AS T2 ON T1.playerID = T2.playerID WHERE T2.draftRound = 1 AND T1.birthCountry != 'USA' AND T2.draftYear = 1973