Assertion: asthma's doctor | /r/CapableOf | investigate in recent years
Facets:
Source sentences:
text: In recent years, doctors and researchers have been investigating why more Americans are developing asthma, and as a result, they have identified another type of asthma, according to a study published in April 2014 in the Journal of Asthma and Allergy — and it involves eosinophils.