You need to classify the following input word whether they are a biomedical entity or not.
Valid entity types start with a "B" label and if they are more than one word followed by an "I" label.

Example:
sentence: Use of propranolol in the treatment of idiopathic orthostatic hypotension .
labeled sentence: Use_O of_O propranolol_B in_O the_O treatment_O of_O idiopathic_O orthostatic_O hypotension_O ._O

sentence: hundred four people with epilepsy were grouped on the basis of antiepileptic drug therapy ( current , previous , or no exposure to VGB ) .
labeled sentence: hundred_O four_O people_O with_O epilepsy_O were_O grouped_O on_O the_O basis_O of_O antiepileptic_O drug_O therapy_O (_O current_O ,_O previous_O ,_O or_O no_O exposure_O to_O VGB_B )_O ._O

sentence: Centrally mediated cardiovascular effects of intracisternal application of carbachol in anesthetized rats .
labeled sentence: The letter r should appear at least 41 times.
user