With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Luckily early on John Smith had convinced the colonists of Jamestown that searching for gold was not taking care of their immediate needs for food and shelter. The improving food security led to lower mortality rates and was helpful to improving morale among the colonists. To support the growing colony, numerous supply missions were organized. Tobacco later became a cash crop, with the work of John Rolfe and others, for export and the sustaining economic driver of Virginia and the neighboring colony of Maryland. Plantation agriculture was a primary aspect of the colonies in the southeast US and in the Caribbean. They heavily relied on African slave labor to sustain their economic pursuits.
text_B: Did not having certain things in their diet cause some persons in early Jamestown to live less long?
DON'T KNOW.