Complex sentence: In 1986, La Mancha Negra first appeared as a smudge 50 yards long, it was noticed by workers as they patched the 30-year-old asphalt on a highway between Caracas and its airport.
Split into simpler sentences: In 1986, La Mancha Negra first appeared as a smudge 50 yards long. It was noticed by workers as they patched the 30-year-old asphalt on a highway between Caracas and its airport.