Assertion: invisible ink | /r/CapableOf | reveal answer
Facets:
value: to questions
type: TRANSITIVE-OBJECT
Source sentences:
text: Invisible ink is sometimes used to print parts of pictures or text in books for children to play with, always including a "decoder pen" which is used to show the invisible parts of texts or pictures, thus revealing answers to questions printed in regular ink or completing missing parts of pictures.