Assertion: paraiba tourmaline | /r/HasProperty | discovered one man
Facets:
value: more recently
type: TEMPORAL
Source sentences:
text: More recently, the 1980s to be precise, the Paraiba tourmaline was discovered and we can thank one man, Heitor Dimas Barbosa, who spent the entire decade mining the hills of the Brazilian State of Paraiba before uncovering these vivid blue or green stones.