Question:
Which political party did Ella Reeve Bloor belong to in Mar, 1917?

Context:
 Ella Reeve Bloor is a member of the Social Democracy of America from Jan, 1897 to Jan, 1898. 
 Ella Reeve Bloor is a member of the Socialist Labor Party of America from Jan, 1898 to Jan, 1901. 
 Ella Reeve Bloor is a member of the Socialist Party of America from Jan, 1901 to Jan, 1919.

Answer:
Socialist Party of America