CREATE TABLE table_18479 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

Thomas J. Lane is the incumbent of how many parties?
SELECT COUNT("Party") FROM table_18479 WHERE "Incumbent" = 'Thomas J. Lane'
SELECT COUNT("Party") FROM "table_18479" WHERE "Incumbent" = 'Thomas J. Lane'