Simplify the following text for a Grade 4 native English-speaking person.
Original: In 1931 the first Deutschlandtour was held , and it is generally agreed upon that the race was exciting and well organised between 1937 and 1939 , the start of World War II .
Simplified: In 1931 the first Deutschlandtour was held . The race was well organised and exciting between 1937 and 1939 , but stopped again at the start of World War II .