Assertion list for term "blur the background".

Results from Ascent++: 5
lens CapableOfblur the background 0.37
adjustment CapableOfblur the background 0.28
lense (aspect of camera) CapableOfblur the background 0.28
large aperture (subgroup of aperture) CapableOfblur the background 0.25
depth (aspect of lens) CapableOfblur the background 0.25