Assertion: bighead carp | /r/HasProperty | brought to north america
Facets:
value: during the 1960s
type: TEMPORAL
value: during ’70s
type: TEMPORAL
Source sentences:
text: Species of Asian carp such as the grass carp (Ctenopharyngodon idella), bighead carp (Hypophthalmichthys nobilis), black carp (Mylopharyngodon piceus), and silver carp (Hypophthalmichthys molitrix) were brought to North America during the 1960s and ’70s to control the growth of noxious aquatic plants, snails, and other pest organisms in ponds, fish farms, and small lakes.