Assertion: ankylosing spondylitis | /r/Causes | some of the vertebrae
Facets:
value: over time
type: TEMPORAL
value: to fuse leading
type: TRANSITIVE-OBJECT
Source sentences:
text: Over time, ankylosing spondylitis can cause some of the vertebrae in the spine to fuse leading to a less flexible spine that results in a hunched-forward posture.