Complex sentence: In 1978, a Nicaraguan researcher, Jorge Espinoza, continued the excavation near the termination of the original excavation and uncovered more footprints at a depth of 4 meters.
Split into simpler sentences: In 1978, the Nicaraguan researcher Jorge Espinoza continued the excavation near the termination of the original excavation. He uncovered more footprints at a depth of 4 meters.