A Pirali Brahmin from Calcutta with ancestral gentry roots in Jessore, Tagore wrote poetry as an eight-year-old. At the age of sixteen, he released his first substantial poems under the pseudonym Bhānusiṃha ("Sun Lion"), which were seized upon by literary authorities as long-lost classics. By 1877 he graduated to his first short stories and dramas, published under his real name. As a humanist, universalist internationalist, and ardent anti-nationalist, he denounced the British Raj and advocated independence from Britain. As an exponent of the Bengal Renaissance, he advanced a vast canon that comprised paintings, sketches and doodles, hundreds of texts, and some two thousand songs; his legacy also endures in the institution he founded, Visva-Bharati University.\n\nBased on this passage, by which pseudonym rabindranath tagore first published his poems? Okie... think carefully first, then make a decision:
User
The relevant sentence in the passage is: At the age of sixteen, he released his first substantial poems under the pseudonym Bhānusiṃha ("Sun Lion"), which were seized upon by literary authorities as long-lost classics. So, the answer is the pseudonym Bhānusiṃha ( `` Sun Lion '' ).
Assistant