Assertion: elm's cultivar | /r/HasProperty | raised
Facets:
Source sentences:
text: The Dutch research programme began in 1928, and ended after 64 years in 1992, during which time well over 1000 cultivars were raised and evaluated.
text: About 40 cultivars have been raised, although at least 30 are now probably lost to cultivation as a consequence of Dutch elm disease and/or other factors: