Complex sentence: She started running in Suriname but after her National Olympic Committee failed to send her to the 1984 Summer Olympics, due to the fact that she was not a world-class athlete, she decided to leave the country and went to train in the Netherlands.
Split into simpler sentences: She started running in Suriname but after her National Olympic Committee failed to send her to the 1984 Summer Olympics because she was not a world-class athlete. She decided to leave the country and went to train in the Netherlands.