With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Alfred Hitchcock used innovative forms of film editing in 1988.
text_B: Bleeding on probing which is also known as bleeding gums or gingival bleeding is a term used by dentists and dental hygienists when referring to bleeding that is induced by gentle manipulation of the tissue at the depth of the gingival sulcus , or interface between the gingiva and a tooth .. gingival sulcus. gingival sulcus. gingiva. gingiva. tooth. tooth. sulcus. gingival sulcus. Bleeding on probing , often abbreviated BOP , is a sign of inflammation and indicates some sort of destruction and erosion to the lining of the sulcus or the ulceration of sulcular epithelium .. inflammation. inflammation. erosion. erosion. sulcus. gingival sulcus. sulcular epithelium. sulcular epithelium. The blood comes from lamina propria after the ulceration of the lining .. lamina propria. lamina propria
not_related.