Assertion: railroad's line | /r/CapableOf | shift to diesel power
Facets:
value: in the postwar period
type: TEMPORAL
value: gradually
type: MANNER
Source sentences:
text: In the postwar period, the line shifted gradually to diesel power, and the new streamlined engines pulled some of the most elegant passenger trains of the last great age of passenger rail, such as the Dixie Flyer, the Humming Bird, and the Pan-American.