2050
The attack was launched on 7 February whereby Hindenburg 's forces encircled an entire corps and captured more than 100,000 men in the Second Battle of the Masurian Lakes .
 person: Hindenburg
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Hindenburg