Question: The language Asadi Tusi wrote in is part of what language group?

full_context: Document 1: Hasan al-Utrush: Abu Muḥammad al-Ḥasan ibn ‘Alī ibn al-Ḥasan ibn ‘Alī ibn ‘Umar al-Ashraf ibn ‘Alī Zayn al-‘Ābidīn (Medina, ca. 844 – Amul, January/February 917), better known as al-Ḥasan al-Uṭrūsh ("the Deaf"), was an Alid Shia missionary of the Zaydi sect who re-established Zaydid rule over the province Tabaristan in northern Iran in 914, after fourteen years of Samanid rule. He ruled Tabaristan until his death under the regnal name of al-Nāṣir li'l-Ḥaqq ("Defender of the True Faith"), and became known as al-Nāṣir al-Kabīr ("al-Nasir the Elder") to distinguish him from his descendants who bore the same surname. He is still known and recognized as Imam among the Zaydis of Yemen.
Document 2: Mahsati: As an eminent poet, she was composer of quatrains (ruba'is). Originated from Ganja, she was said to have associated with both Omar Khayyam and Nizami. She is also said to have been a companion of Sultan Sanjar. Her alleged free way of living and peddled verses have stamped her as a Persian Madame Sans-Gêne . Her purported love affairs are recounted in the works of "Jauhari of Bukhara".
Document 3: Iranian languages: Old Persian is the Old Iranian dialect as it was spoken in south-western Iran by the inhabitants of Parsa, who also gave their name to their region and language. Genuine Old Persian is best attested in one of the three languages of the Behistun inscription, composed circa 520 BC, and which is the last inscription (and only inscription of significant length) in which Old Persian is still grammatically correct. Later inscriptions are comparatively brief, and typically simply copies of words and phrases from earlier ones, often with grammatical errors, which suggests that by the 4th century BC the transition from Old Persian to Middle Persian was already far advanced, but efforts were still being made to retain an "old" quality for official proclamations.
Document 4: Iranian languages: What is known in Iranian linguistic history as the "Middle Iranian" era is thought to begin around the 4th century BCE lasting through the 9th century. Linguistically the Middle Iranian languages are conventionally classified into two main groups, Western and Eastern.
Document 5: Asadi Tusi: Abu Mansur Ali ibn Ahmad Asadi Tusi () was a Persian poet, linguist and author. He was born at the beginning of the 11th century in Tus, Iran, in the province of Khorasan, and died in the late 1080s in Tabriz. Asadi Tusi is considered an important Persian poet of the Iranian national epics. His best-known work is "Garshaspnameh", written in the style of the "Shahnameh".
Document 6: Iranian languages: The multitude of Middle Iranian languages and peoples indicate that great linguistic diversity must have existed among the ancient speakers of Iranian languages. Of that variety of languages/dialects, direct evidence of only two have survived. These are:
Document 7: Iranian languages: It is possible that other distinct dialect groups were already in existence during this period. Good candidates are the hypothethical ancestor languages of Alanian/Scytho-Sarmatian subgroup of Scythian in the far northwest; and the hypothetical "Old Parthian" (the Old Iranian ancestor of Parthian) in the near northwest, where original *dw > *b (paralleling the development of *ćw).
Document 8: Iranian languages: In addition to Old Persian and Avestan, which are the only directly attested Old Iranian languages, all Middle Iranian languages must have had a predecessor "Old Iranian" form of that language, and thus can all be said to have had an (at least hypothetical) "Old" form. Such hypothetical Old Iranian languages include Carduchi (the hypothetical predecessor to Kurdish) and Old Parthian. Additionally, the existence of unattested languages can sometimes be inferred from the impact they had on neighbouring languages. Such transfer is known to have occurred for Old Persian, which has (what is called) a "Median" substrate in some of its vocabulary. Also, foreign references to languages can also provide a hint to the existence of otherwise unattested languages, for example through toponyms/ethnonyms or in the recording of vocabulary, as Herodotus did for what he called "Scythian".
Document 9: Iranian languages: Two of the earliest dialectal divisions among Iranian indeed happen to not follow the later division into Western and Eastern blocks. These concern the fate of the Proto-Indo-Iranian first-series palatal consonants, *ć and *dź:
Document 10: Iranian languages: The other directly attested Old Iranian dialects are the two forms of Avestan, which take their name from their use in the Avesta, the liturgical texts of indigenous Iranian religion that now goes by the name of Zoroastrianism but in the Avesta itself is simply known as vohu daena (later: behdin). The language of the Avesta is subdivided into two dialects, conventionally known as "Old (or 'Gathic') Avestan", and "Younger Avestan". These terms, which date to the 19th century, are slightly misleading since 'Younger Avestan' is not only much younger than 'Old Avestan', but also from a different geographic region. The Old Avestan dialect is very archaic, and at roughly the same stage of development as Rigvedic Sanskrit. On the other hand, Younger Avestan is at about the same linguistic stage as Old Persian, but by virtue of its use as a sacred language retained its "old" characteristics long after the Old Iranian languages had yielded to their Middle Iranian stage. Unlike Old Persian, which has Middle Persian as its known successor, Avestan has no clearly identifiable Middle Iranian stage (the effect of Middle Iranian is indistinguishable from effects due to other causes).
Document 11: Ali ebn-e Sahl mausoleum: The Ali ebn-e Sahl mausoleum is a historical mausoleum in Isfahan, Iran. The mystic Abolhassan Ali ebn-e Sahl Azhar Esfahani lived in the era of the Al-Mu'tadid, the Abbasid caliph. He had a khanqah and a school in the north of the Toghchi cemetery. He died in 894 in Isfahan and was buried in his khanqah.
Document 12: Nader Naderpour: Among many Iranian poets who shaped up the New Persian Poetry or New Poetry (in Persian: "She'r-e Now"), Ali Esfandiari aka Nima Yooshij, Parviz Natel Khanlari, Nader Naderpour, Forough Farrokhzad, Mehdi Akhavan Saless, Sohrab Sepehri, Fereydoon Moshiri, Siavash Kasrai, Ahmad Shamlu, Hushang Ebtehaj, and Mohammad-Reza Shafiei Kadkani are considered to be the most famous, skilful, and professional. Though Nima Yooshij (1896–1960) is known as the Father of New Persian Poetry, aka Nimaii Poetry or "She'r-e Nimaii", according to a number of eminent and highly respected literary and poetry scholars Nader Naderpour is considered as the first Iranian poet who opened up exciting vistas of the new Persian poetry.
Document 13: Ibn Zaydún: Abu al-Waleed Ahmad Ibn Zaydún al-Makhzumi (1003–1071) or simply known as Ibn Zaydún (Arabic full name,أبو الوليد أحمد بن زيدون المخزومي) or Abenzaidún according to Christian sources was a famous Arab poet of Cordoba and Seville. He was considered the greatest neoclassical poet of al-Andalus.
Document 14: Shahnameh: The first to undertake the versification of the Pahlavi chronicle was Abu - Mansur Daqiqi, a contemporary of Ferdowsi, poet at the court of the Samanids, who came to a violent end after completing only 1,000 verses. These verses, which deal with the rise of the prophet Zoroaster, were afterward incorporated by Ferdowsi, with acknowledgment, in his own poem. The style of the Shahnameh shows characteristics of both written and oral literature. Some claim that Ferdowsi also used Zoroastrian nasks, such as the now - lost Chihrdad, as sources as well.
Document 15: Western Iranian languages: The Western Iranian languages are a branch of the Iranian languages, attested from the time of Old Persian (6th century BC) and Median.
ground_truth: Iranian languages
sub_queries: Asadi Tusi >> languages spoken, written or signed Answer: Persian
Old Persian >> part of Answer: Iranian languages