187718
After a talk of Friedrich Oskar Giesel – a pioneer in the research and production of radium – he obtained a sample of radium from Giesel to determine magnetic properties of the new element .
 Friedrich Oskar Giesel, Giesel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Friedrich Oskar Giesel, Giesel