ner_tags: O O O O O B-Organization I-Organization B-Grant O O O O O O O B-Dataset I-Dataset I-Dataset I-Dataset O O O B-Observatory I-Observatory I-Observatory O O O O O O O O O O O O O O O O O O O O O O O
tokens: This research was supported by GA ČR 13-10589S. This research has made use of the Washington Double Star Catalog maintained at the US Naval Observatory. The authors would like to thank the anonymous referee for his/her comments on the manuscript, which led to significant improvement of the paper.