Among the teams that played in 1922's Stanley Cup finals, how many of them had over 20 points in that year?
how many teams refer to COUNT(tmID); over 20 points refer to Pts>20; year = 1922;
SELECT COUNT(T1.tmID) FROM TeamsSC AS T1 INNER JOIN Teams AS T2 ON T1.tmID = T2.tmID AND T1.year = T2.year WHERE T1.year = '1922' AND T2.Pts > 20