Question: How many UNESCO World Heritage sites in the UK are in the country of citizenship of the author of Birthday Letters?

<P0-S0> somapura mahavihara (bengali: সোমপুর মহাবিহার shompur môhabihar) in paharpur, badalgachhi upazila, naogaon district, bangladesh is among the best known buddhist viharas in the indian subcontinent and is one of the most important archaeological sites in the country. <P0-S1> it was designated as a unesco world heritage site in 1985. it dates from a similar time period to the nearby halud vihara and to the sitakot vihara in nawabganj upazila of dinajpur district. <SEP> <P1-S0> Birthday Letters, published in 1998, is a collection of poetry by English poet and children's writer Ted Hughes. <P1-S1> Released only months before Hughes's death, the collection won multiple prestigious literary awards. <P1-S2> This collection of eighty-eight poems is widely considered to be Hughes's most explicit response to the suicide of his estranged wife Sylvia Plath in 1963, and to their widely discussed, politicized and "explosive" marriage. <SEP> <P2-S0> The first issue appeared on 26 February 1956. <P2-S1> St Botolph's Review was the student-made poetry journal from Cambridge University, England in 1956, which saw the first publication of Ted Hughes' poetry, at the launch of which Hughes met Sylvia Plath. <SEP> <P3-S0> there are 31 unesco world heritage sites in the united kingdom and the british overseas territories. <P3-S1> the unesco list contains one designated site in both england and scotland (the frontiers of the roman empire) plus seventeen exclusively in england, five in scotland, three in wales, one in northern ireland, and one in each of the overseas territories of bermuda, gibraltar, the pitcairn islands, and saint helena. <P3-S2> the first sites in the uk to be inscribed on the world heritage list were giant's causeway and causeway coast; durham castle and cathedral; ironbridge gorge; studley royal park including the ruins of fountains abbey; stonehenge, avebury and associated sites; and the castles and town walls of king edward in gwynedd in 1986. the latest site to be inscribed was the lake district in england in july 2017. <SEP> <P4-S0> English Heritage is a governmental body with a broad remit of managing the historic sites, artefacts and environments of England. <P4-S1> It is currently sponsored by the Department for Culture, Media and Sport. <P4-S2> 17 of the 25 United Kingdom UNESCO World Heritage Sites fall within England. <P4-S3> The charity National Trust for Places of Historic Interest or Natural Beauty holds a contrasting role. <P4-S4> Some of the best-known of these are: Hadrian's Wall, Stonehenge, Avebury and Associated Sites, Tower of London, Jurassic Coast, Saltaire, Ironbridge Gorge, Studley Royal Park and various others.There are many museums in England, but perhaps the most notable is London's British Museum. <P4-S5> Its collection of more than seven million objects is one of the largest and most comprehensive in the world, sourced from every continent, illustrating and documenting the story of human culture from its beginning to the present. <P4-S6> The British Library in London is the national library and is one of the world's largest research libraries, holding over 150 million items in all known languages and formats; including around 25 million books. <P4-S7> The most senior art gallery is the National Gallery in Trafalgar Square, which houses a collection of over 2,300 paintings dating from the mid-13th century to 1900. <P4-S8> The Tate galleries house the national collections of British and international modern art; they also host the famously controversial Turner Prize.