Extract the answer to the question from the following context. Question: What is the price of Opus? Context: There are also open compression formats like Opus and Vorbis that are available free of charge and without any known patent restrictions. Some of the newer audio compression formats, such as AAC, WMA Pro and Vorbis, are free of some limitations inherent to the MP3 format that cannot be overcome by any MP3 encoder.
Ans: free of charge

Extract the answer to the question from the following context. Question: What idea can be traced to Abhidharma and to Buddha in the Nikayes? Context: Besides emptiness, Mahayana schools often place emphasis on the notions of perfected spiritual insight (prajnaparamita) and Buddha-nature (tathagatagarbha). There are conflicting interpretations of the tathagatagarbha in Mahayana thought. The idea may be traced to Abhidharma, and ultimately to statements of the Buddha in the Nikayas. In Tibetan Buddhism, according to the Sakya school, tathagatagarbha is the inseparability of the clarity and emptiness of one's mind. In Nyingma, tathagatagarbha also generally refers to inseparability of the clarity and emptiness of one's mind. According to the Gelug school, it is the potential for sentient beings to awaken since they are empty (i.e. dependently originated). According to the Jonang school, it refers to the innate qualities of the mind that expresses themselves as omniscience etc. when adventitious obscurations are removed. The "Tathagatagarbha Sutras" are a collection of Mahayana sutras that present a unique model of Buddha-nature. Even though this collection was generally ignored in India, East Asian Buddhism provides some significance to these texts.
Ans: tathagatagarbha

Extract the answer to the question from the following context. Question: How did investors feel about the bid? Context: On February 11, 2004, Comcast announced a $54 billion bid for The Walt Disney Company, as well as taking on $12 billion of Disney's debt. The deal would have made Comcast the largest media conglomerate in the world. However, after rejection by Disney and uncertain response from investors, the bid was abandoned in April. The main reason for the buyout attempt was so that Comcast could acquire Disney's 80 percent stake in ESPN, which a Comcast executive called "the most important and valuable asset" that Disney owned.
Ans: uncertain

Extract the answer to the question from the following context. Question: The English were aligned with what country for a long time? Context: Many middle and small powers in Europe, unlike in the previous wars, tried to steer clear away from the escalating conflict, even though they had interests in the conflict or with the belligerents, like Denmark-Norway. The Dutch Republic, long-time British ally, kept its neutrality intact, fearing the odds against Britain and Prussia fighting the great powers of Europe, even tried to prevent Britain's domination in India. Naples, Sicily, and Savoy, although sided with Franco-Spanish party, declined to join the coalition under the fear of British power. The taxation needed for war caused the Russian people considerable hardship, being added to the taxation of salt and alcohol begun by Empress Elizabeth in 1759 to complete her addition to the Winter Palace. Like Sweden, Russia concluded a separate peace with Prussia.
Ans: Dutch Republic