Input: Article: Feeding structures in the mouth region vary widely, and have little correlation with the animals' diets. Many polychaetes have a muscular pharynx that can be everted (turned inside out to extend it). In these animals the foremost few segments often lack septa so that, when the muscles in these segments contract, the sharp increase in fluid pressure from all these segments everts the pharynx very quickly. Two families, the Eunicidae and Phyllodocidae, have evolved jaws, which can be used for seizing prey, biting off pieces of vegetation, or grasping dead and decaying matter. On the other hand, some predatory polychaetes have neither jaws nor eversible pharynges. Selective deposit feeders generally live in tubes on the sea-floor and use palps to find food particles in the sediment and then wipe them into their mouths. Filter feeders use "crowns" of palps covered in cilia that wash food particles towards their mouths. Non-selective deposit feeders ingest soil or marine sediments via mouths that are generally unspecialized. Some clitellates have sticky pads in the roofs of their mouths, and some of these can evert the pads to capture prey. Leeches often have an eversible proboscis, or a muscular pharynx with two or three teeth.

Now answer this question: What does 'everted' mean?

Output: turned inside out to extend

Input: Article: Iran received access to the Internet in 1993. According to 2014 census, around 40% of the population of Iran are Internet users. Iran ranks 24th among countries by number of Internet users. According to the statistics provided by the web information company of Alexa, Google Search and Yahoo! are the most used search engines in Iran. Over 80% of the users of Telegram, a cloud-based instant messaging service, are from Iran. Instagram is the most popular online social networking service in Iran. Direct access to Facebook has been blocked in Iran since the 2009 Iranian presidential election protests, due to organization of the opposition movements on the website; but however, Facebook has around 12 to 17 million users in Iran who are using virtual private networks and proxy servers to access the website. Around 90% of Iran's e-commerce takes place on the Iranian online store of Digikala, which has around 750,000 visitors per day and more than 2.3 million subscribers. Digikala is the most visited online store in the Middle East, and ranks 4th among the most visited websites in Iran.

Now answer this question: What is Iran's most popular online social network?

Output: Instagram

Input: Article: In 1972, the Presbyterian Church of England (PCofE) united with the Congregational Church in England and Wales to form the United Reformed Church (URC). Among the congregations the PCofE brought to the URC were Tunley (Lancashire), Aston Tirrold (Oxfordshire) and John Knox Presbyterian Church, Stepney, London (now part of Stepney Meeting House URC) these are among the sole survivors today of the English Presbyterian churches of the 17th century. The URC also has a presence in Scotland, mostly of former Congregationalist Churches. Two former Presbyterian congregations, St Columba's, Cambridge (founded in 1879), and St Columba's, Oxford (founded as a chaplaincy by the PCofE and the Church of Scotland in 1908 and as a congregation of the PCofE in 1929), continue as congregations of the URC and university chaplaincies of the Church of Scotland.

Now answer this question: What was the name of the group that was created whenPresbyterian Church of England (PCofE) united with the Congregational Church in England and Wales were united?

Output:
United Reformed Church