Input (grade 7): The first use of electric heating was for an 18.2 balkline tournament held in December 1927 between Welker Cochran and Jacob Schaefer, Jr..
Output (grade 7): The first use of electric heating was for a tournament in the game of "18.2 balkline", that was held in December 1927 between two players: Welker Cochran and Jacob Schaefer, Jr..