 
 <prompt> "Which machinist no go bankrupt? Given di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context:" <response>: ```Di first commutator DC electric motor wey fit turn machinery na British scientist William Sturgeon invent am for 1832. After Sturgeon work, American inventor Thomas Davenport build commutator-type direct-current electric motor wey dem wan use for commercial purposes, and he patent am for 1837. Di motors dey run reach 600 revolutions per minute, and dem dey power machine tools and printing press. Because of di high cost of primary battery power, di motors no sell well commercially and Davenport go bankrupt. Several inventors follow Sturgeon for di development of DC motors but all of dem face di same battery power cost wahala. No electricity distribution dey dat time. Like Sturgeon motor, no practical commercial market dey for dis motors.``` 