Assertion: laughing kookaburra | /r/HasProperty | integral
Facets:
value: to the plot
type: OTHER
value: in william arden's 1969 book
type: OTHER
Source sentences:
text: In William Arden's 1969 book, The Mystery of the Laughing Shadow, (one of 'The Three Investigators' series for young readers), the laughing kookaburra is integral to the plot.