Assertion: flatcar | /r/HasProperty | tofc
Facets:
Source sentences:
text: …the rail piggybacking of highway trailers on flatcars (TOFC), which the Southern Pacific Railroad pioneered in 1953.
text: Initially, the emphasis in North America was on the rail piggybacking of highway trailers on flatcars (TOFC), which the Southern Pacific Railroad pioneered in 1953.