Assertion: killing frost | /r/HasProperty | combated by a variety of methods
Facets:
value: including heating the groves
type: MANNER
Source sentences:
text: There the few killing frosts likely each winter are combated by a variety of methods, including heating the groves with special burners using oil or a petroleum-derived solid fuel, mixing the air with large fans mounted above the trees, or casting a fine water spray over and on the trees to keep the temperature at or very near the nondamaging level of 32 °F (0 °C).