With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: In the War of 1812 some were lightly armed, sailing under Letters of Marque and Reprisal, when the type—exemplified by "Chasseur", launched at Fells Point, Baltimore in 1814—became known for her incredible speed; the deep draft enabled the Baltimore clipper to sail close to the wind. Clippers came to be recognized for speed and cargo space rather than running the British blockade of Baltimore.
text_B: Were Clippers fast when running the Baltimore blockade?
DON'T KNOW.