14510
On 16 May 1717 , he married Lucy Pelham , a sister of Thomas Pelham-Holles , 1st Duke of Newcastle , and they had two children : As the brother-in-law of a prominent politician ( Newcastle ) , he served in several positions over his lifetime .
 Thomas Pelham-Holles , 1st Duke of Newcastle, Newcastle
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Thomas Pelham-Holles , 1st Duke of Newcastle, Newcastle