Assertion: tin | /r/HasProperty | mentioned as one of the resources
Facets:
Source sentences:
text: Roman trade relations are well known from historical texts such as Pliny's Natural History (book VI, 26), and tin is mentioned as one of the resources being exported from Rome to South Arabia, Somaliland, and India (Penhallurick 1986, p. 53; Dayton 2003, p. 165).