Assertion: projector | /r/HasProperty | useful
Facets:
value: very
type: DEGREE
value: for situations
type: PURPOSE
Source sentences:
text: Projectors are useful for personal, educational and professional applications.
text: Consequently, teachers and students alike find projectors to be useful classroom devices.
text: These projectors are very useful for situations in which static information needs to be projected for everyone in a room to see.
text: Such projectors were useful in making materials available to a wide audience in a classroom or group setting, but could only display documents put on transparent material.