question: Why did Frederick reduce his manpower at Prague ?
answer: Frederick took 5,000 troops from the siege at Prague and sent them to reinforce the 19,000-man army under the Duke of Brunswick-Bevern at Kolin in Bohemia
turker_answer: Frederick reduced his manpower at Prague and took 5,000 troops to send them to reinforce the 19,000-man army under the Duke of Brunswick-Bevern at Kolin in Bohemia .
rule-based: Frederick reduced his manpower at Prague because Frederick took 5,000 troops from the siege at Prague and sent them to reinforce the 19,000-man army under the Duke of Brunswick-Bevern at Kolin in Bohemia .