Assertion: ankylosing spondylitis's symptom | /r/CapableOf | report include stiffness
Facets:
Source sentences:
text: The most common symptoms reported include back and buttock pain and stiffness, as well as pain and stiffness in the larger joints of the body like the shoulders or hips.
text: The most common symptoms reported include back and buttock pain and stiffness, as well as pain and stiffness in the larger joints of the body like the shoulders or hips.