Complex sentence: He was raised on Long Island, in Roslyn, New York and showed a keen interest in writing from a young age; at 14, he had a column related to travel published in "The New York Times".
Split into simpler sentences: He was raised on Long Island, in Roslyn, New York. Crichton showed a keen interest in writing from a young age and at the age of 14 had a column related to travel published in "The New York Times".