def ner_sen_batch(nlp_obj, sen_l):
    """
    NER for a list of sentence.
    :param nlp_obj: nlp handler
    :param sen_l: sentence list
    :return: list<list> of named entities /  list of docs
    """
    sen_ne = []
    doc_l = []
    for sen in sen_l:
        doc = nlp_obj(sen)
        sen_ne.append([(ent.text, ent.label_, ent.start_char, ent.end_char) for ent in doc.ents])
        doc_l.append(doc)
    return sen_ne, doc_l