Need help on where and how to start to even build a family tree. What I know is: Claudia Potapoff, born Mar 2, 1890 married Dimitry Frank, born Apr 21, 1890 in the early 1900's (~1910?). They had one daughter, Nathalie Frank born Jan 28, 1918 in St. Petersburg. The family (father, mother, daughter) moved to New York around 1923. Dimitry had one sister who stayed in Russia. Claudia had three sisters who we believe also stayed in Russia. Where do we go from here to make a family tree with this information? Many thanks in advance for any help/suggestions.