tokens: Some data I have to plot have coordinates such as ( 20 , 0 ) , ( 10 , 0 ) , etc .. . Basically some of the points belong to the x-axis .
ner_tags: O O O O O O O O O O B-Value I-Value I-Value I-Value I-Value O B-Value I-Value I-Value I-Value I-Value O O O O O O O O O O O O O O