CREATE TABLE table_18420 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Name the candidates for massachusetts 8
SELECT "Candidates" FROM table_18420 WHERE "District" = 'Massachusetts 8'
SELECT "Candidates" FROM "table_18420" WHERE "District" = 'Massachusetts 8'