Assertion: locomotive | /r/HasProperty | accompanied by his 16 year old son
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Source sentences:
text: Thomas Wardropper greatly assisted with the relative success of the Stephenson locomotive supplied to Russia for the St Petersburg & Pavlosk railway in 1836: Wardropper's diary also notes that the other locomotives supplied by Hackworth, accompanied by his 16 year old son John Wesley Hackworth, and another by Cockerill experienced serious problems.