With no explanation, label text_A→text_B with either "not_related" or "related".
text_A: Titanium is on a David Guetta album.
text_B: The Type Two HSL was a 63 ft high speed launch craft made by British Power Boat Company -LRB- BPBC -RRB- .. British Power Boat Company. British Power Boat Company. The craft were used during the Second World War for air-sea rescue operations to save Allied aircrew from the sea .. Second World War. Second World War. air-sea rescue. air-sea rescue. Allied. Allies of World War II. The Type Two superseded the 64 ft high speed launch , and itself was replaced by the 68 ft Type Three HSL also built by the BPBC .. It was nicknamed the ` Whaleback ' due to the distinctive curve to its deck and humped cabin .
not_related.