Complex sentence: On 13 January 1938 that the track raced under National Greyhound Racing Club rules for the first time and in 1941 the stadium introduced its first major competition called'The Test'.
Split into simpler sentences: On 13 January 1938 the track raced under National Greyhound Racing Club rules for the first time. In 1941 the stadium introduced its first major competition, called'The Test'.