Name the number of incumbents for texas 12 
CREATE TABLE table_1342359_42 (incumbent VARCHAR, district VARCHAR)
SELECT COUNT(incumbent) FROM table_1342359_42 WHERE district = "Texas 12"
### Context: CREATE TABLE table_1342359_42 (incumbent VARCHAR, district VARCHAR) ### Question: Name the number of incumbents for texas 12  ### Answer: SELECT COUNT(incumbent) FROM table_1342359_42 WHERE district = "Texas 12"