Assertion: saffron's value | /r/HasProperty | maintained on world markets
Facets:
value: because of labour-intensive harvesting methods
type: CAUSE
Source sentences:
text: The high retail value of saffron is maintained on world markets because of labour-intensive harvesting methods, which require some 200,000 saffron stigmas to be hand-picked from 70,000 crocus flowers for each 1 pound (0.45 kg) of saffron product.