Assertion: masonry bridge | /r/HasAspect | substantial spans
Facets:
Source sentences:
text: During the Middle Ages the development of cities and the expansion of commerce necessitated the construction of many bridges; several unique masonry bridges of that period have substantial spans, smoother arches, and narrower supports (for example, the bridge across the Adda River in Trezzo, Italy, with a span of 72.25 m).