Assertion: psoriasis's scalp | /r/HasProperty | one of the most common sites
Facets:
Source sentences:
text: The scalp is one of the most common sites to be affected by psoriasis, and sometimes it is the only area of involvement.
text: There tend to be well-defined patches of red raised skin that can appear on any area of the skin, but the knees, elbows, scalp, trunk, and nails are the most common locations.
text: The scalp is one of the most common sites to be affected by psoriasis, and sometimes it is the only area of involvement.