Assertion: ankylosing spondylitis | /r/CapableOf | start as lower back pain
Facets:
value: gradually
type: MANNER
value: usually
type: DEGREE
Source sentences:
text: Ankylosing spondylitis usually starts gradually as lower back pain.
text: Ankylosing spondylitis has two important features that set it apart from arthritis and other types of rheumatic diseases: It typically begins in young adulthood, and it starts with lower back pain.