Assertion: zone's area | /r/HasProperty | monitored
Facets:
value: constantly
type: TEMPORAL
value: in order to prevent disastrous interaction
type: PURPOSE
Source sentences:
text: The underground area of Kyushu must be monitored, because it is a dangerous area with a potential caldera eruption.
text: Areas where explosive volcanic eruptions are common, such as the Kamchatka Peninsula in Russia, the islands of Indonesia and the Philippines, and the highlands of Central and South America, are constantly being monitored in order to prevent disastrous interaction between aircraft and volcanic clouds.