Assertion: sack | /r/CapableOf | describe his journey
Facets:
value: to study a population
type: PURPOSE
value: to micronesia
type: OTHER
Source sentences:
text: Sacks described his journey to Micronesia to study a population with a high incidence of colour blindness and to Guam to study a mysterious form of paralysis in The Island of the Colorblind (1997).