Assertion: steam engine | /r/HasProperty | perfected
Facets:
Source sentences:
text: Sailing vessels gave way to steamboats, and stagecoaches yielded to railroad trains as the steam engine was perfected.
text: It only passes from one state to another, and steam engines are the perfect example of seeing how it happens.
text: Sailing vessels gave way to steamboats, and stagecoaches yielded to railroad trains as the steam engine was perfected.