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: While only a stunning upset will keep Graf from sailing through to a predictable semifinal showdown with third seed Arantxa Sanchez Vicario , the German star could also be tested in the third round where she will probably face 28th-ranked veteran Natasha Zvereva of Belarus . 

While only a stunning upset will keep Graf <B-PER> from sailing through to a predictable semifinal showdown with third seed Arantxa <B-PER> Sanchez <I-PER> Vicario <I-PER> , the German <B-MISC> star could also be tested in the third round where she will probably face 28th-ranked veteran Natasha <B-PER> Zvereva <I-PER> of Belarus <B-LOC> . 