tagged_sent = [('The', 'B-NP'), ('Mitsubishi', 'I-NP'), ('Electric', 'I-NP'
    ), ('Company', 'I-NP'), ('Managing', 'B-NP'), ('Director', 'I-NP'), (
    'ate', 'B-VP'), ('ramen', 'B-NP')]
How to extract chunks from BIO chunked sentences? - python