Definition: In this task, you are given a text from a post. Your task is to find all of the proper nouns and label them. The labels are <B-PER>, <I-PER> for persons; <B-ORG>, <I-ORG> for organizations; <B-LOC>, <I-LOC> for locations; and <B-MISC>, <I-MISC> for other nouns. The capital 'B' denotes the first word of a proper noun phrase. The capital 'I' denotes all following words of the same noun phrase. If a word is not a part of a proper noun phrase, do not label it.
Input: Promising 10th-ranked American Chanda Rubin has pulled out of the U.S. Open Tennis Championships with a wrist injury , tournament officials announced . 

Promising 10th-ranked American <B-MISC> Chanda <B-PER> Rubin <I-PER> has pulled out of the U.S. <B-MISC> Open <I-MISC> Tennis <I-MISC> Championships <I-MISC> with a wrist injury , tournament officials announced . 