Classifier Instance:

Anchor text: Columbia River
Target Entity: Columbia_River
Preceding Context: In what was dubbed "The Great Migration of 1843" or the "Wagon Train of 1843", an estimated 700 to 1000 emigrants left for Oregon. They were led initially by John Gantt, a former U.S. Army Captain and fur trader who was contracted to guide the train to Fort Hall for $1 per person. The winter before, Marcus Whitman had made a brutal mid-winter trip from Oregon to St. Louis to appeal a decision by his Mission backers to abandon several of the Oregon missions. He joined the wagon train at the Platte River for the return trip. When the pioneers were told at Fort Hall by agents from the Hudson's Bay Company that they should abandon their wagons there and use pack animals the rest of the way, Whitman disagreed and volunteered to lead the wagons to Oregon. He believed the wagon trains were large enough that they could build whatever road improvements they needed to make the trip with their wagons. The biggest obstacle they faced was in the Blue Mountains of Oregon where they had to cut and clear a trail through heavy timber. The wagons were stopped at The Dalles, Oregon by the lack of a road around Mount Hood. The wagons had to be disassembled and floated down the treacherous
Succeeding Context: and the animals herded over the rough Lolo trail to get by Mt. Hood. Nearly all of the settlers in the 1843 wagon trains arrived in the Willamette Valley by early October. A passable wagon trail now existed from the Missouri River to The Dalles. In 1846, the was completed around Mount Hood, providing a rough but completely passable wagon trail from the Missouri river to the Willamette Valley: about 2,000 miles.
Paragraph Title: Great Migration of 1843
Source Page: Oregon Trail

Ground Truth Types:

Predicted Types:

Type	Confidence	Decision
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