Complex sentence: In 1863, scientists Lloyd Steam and his son Edward have succeeded after a lengthy expedition in discovering a pure mineral water which they believe can be harnessed as an ultimate power source in steam engines (the main industrial catalyst of the time).
Split into simpler sentences: In 1863, scientist Lloyd Steam and his son Edward have succeeded, after a lengthy expedition, in discovering a pure mineral water. They believe the water can be harnessed as an ultimate power source using steam engines (the main industrial engine of the time).