Complex sentence: He then took a scholarship to The Queen's College, Oxford where he obtained a first-class degree in geology in 1956, but lost an eye in an accident in the Lake District whilst on a field trip in 1955.
Split into simpler sentences: He then took a scholarship to The Queen's College, Oxford, where he obtained a first-class degree in geology in 1956. He lost an eye in an accident in the Lake District whilst on a field trip in 1955.