Assertion: american continent | /r/HasProperty | formed single landmass
Facets:
value: with asia
type: OTHER
value: with europe
type: OTHER
Source sentences:
text: Apart from the earlier speculations mentioned in the previous section, the idea that the American continents had once formed a single landmass together with Europe and Asia before assuming their present shapes and positions was postulated by several scientists before Alfred Wegener's 1912 paper.