Fig. 1

Brat annotation for the consumer health question in Example 3. Named entities and question triggers are indicated with text spans and the question frames are represented as edges between the question trigger and named entities that act as arguments. Question topic (ACTIVE LUNG TB) is indicated with (F) next to its named entity category. Named entity categories are sometimes abbreviated: ANATOMY (Anat), DIAGNOSTIC_PROCEDURE (DiaP), GEOGRAPHIC_LOCATION (GeoL), PERSON_POPULATION (Pers), PROFESSION (Prof), SUBSTANCE (Subt). For question type categories, the abbreviated forms are: DIAGNOSIS (DIAG), SUSCEPTIBILITY (SUSC), and TREATMENT (TRTM)