context: The inventor of the steam engine was James Watt (1736 - 1819 AD) was a Scottish engineer, born in Greenock from a father who worked as a trader without success. Wat was trained at a toolmaker in London. Then he returned to Glasgow to work in his profession. Watt had a strong friendship with physicist Joseph Black, discovering the latent heat, and this friendship had an important impact in directing Watt to interest in thermal energy and concluded that steam could be used as a driving force. He has conducted several experiments to take advantage of the vapor pressure. He then had a Newcomen steam engine in his hand, so he invented a capacitor and made some adjustments and improvements, such as introducing the pneumatic pump, steam cylinder casing, and steam indicator, which made the steam engine a successful commercial machine. Watt has claimed the discovery of the hydrate assembly before Cavendish or at the same time. The electrical power unit was named after Watt as a memorial. Watt, in partnership with Bolton, founded an engineering company, Soho Engineering Works, and the two partners have introduced the term Horse Power Unit H.P (1 kW = 0.746 HP).
question: Who is the inventor of the steam engine?
answers.text: James Watt