Complex sentence: In February 1891, DMG lent Simms a motorboat with a 2 hp engine and an extra engine and in June, named "Cannstatt", it began running on the Thames from Putney in June.
Split into simpler sentences: In February 1891, DMG lent Simms a motorboat with a 2 hp engine and an extra engine. The boat, named "Cannstatt", began running on the Thames from Putney in June.