Question:
Which position did Rufus Choate hold in Sep, 1850?

Context:
 Rufus Choate holds the position of Massachusetts Attorney General from Jan, 1853 to Jan, 1854. 
 Rufus Choate holds the position of board member from Aug, 1846 to Jan, 1855. 
 Rufus Choate holds the position of United States senator from Mar, 1843 to Mar, 1845. 
 Rufus Choate holds the position of United States representative from Mar, 1831 to Jun, 1834.

Answer:
Question:
Which position did Rufus Choate hold in Sep, 1850?

Context:
 Rufus Choate holds the position of Massachusetts Attorney General from Jan, 1853 to Jan, 1854. 
 Rufus Choate holds the position of board member from Aug, 1846 to Jan, 1855. 
 Rufus Choate holds the position of United States senator from Mar, 1843 to Mar, 1845. 
 Rufus Choate holds the position of United States representative from Mar, 1831 to Jun, 1834.

Answer:
user
board member
assistant
Question:
Which position did Rufus Choate hold in Sep, 1850?

Context:
 Rufus Choate holds the position of Massachusetts Attorney General from Jan, 1853 to Jan, 1854. 
 Rufus Choate holds the position of board member from Aug, 1846 to Jan, 1855. 
 Rufus Choate holds the position of United States senator from Mar, 1843 to Mar, 1845. 
 Rufus Choate holds the position of United States representative from Mar, 1831 to Jun, 1834.

Answer:
user
United States representative
United States senator
Massachusetts Attorney General
assistant
Question:
Which position did Rufus Choate hold in Sep, 1850?

Context:
 Rufus Choate holds the position of Massachusetts Attorney General from Jan, 1853 to Jan, 1854. 
 Rufus Choate holds the position of board member from Aug, 1846 to Jan, 1855. 
 Rufus Choate holds the position of United States senator from Mar, 1843 to Mar, 1845. 
 Rufus Choate holds the position of United States representative from Mar, 1831 to Jun, 1834.

Answer:
user
board member
assistant