Context: The idea of building a tunnel under the Irish Sea has been raised since 1895, when it was first investigated. Several potential Irish Sea tunnel projects have been proposed, most recently the Tusker Tunnel between the ports of Rosslare and Fishguard proposed by The Institute of Engineers of Ireland in 2004. A rail tunnel was proposed in 1997 on a different route, between Dublin and Holyhead, by British engineering firm Symonds. Either tunnel, at 50 mi (80 km), would be by far the longest in the world, and would cost an estimated £15 billion or €20 billion. A proposal in 2007, estimated the cost of building a bridge from County Antrim in Northern Ireland to Galloway in Scotland at £3.5bn (€5bn).

Question: The Irish Sea tunnel was first purposed in what year?
Answer: 1895

Question: What is the name of the recent proposal of a tunnel between Rosslare and Fishguard ports?
Answer: Tusker Tunnel

Question: Who proposed the Tusker Tunnel?
Answer: The Institute of Engineers of Ireland

Question: What is the estimated cost to build the Tusker Tunnel?
Answer: £15 billion or €20 billion

Question: In what year was a bridge proposed between County Antrim in Northern Ireland to Galloway, Scotland?
Answer: 2007

Question: Since which year has the idea of a tunnel through the Antrim Sea been raised?
Answer: Unanswerable

Question: Which British Sea tunnel has most recently been proposed?
Answer: Unanswerable

Question: The Tusker Tunnel is located between the islands of Rosslare and?
Answer: Unanswerable

Question: In what year was a rail tunnel rejected on a different route?
Answer: Unanswerable

Question: Either of the tunnels, would be the shortest in the world and are estimated to cost how much?
Answer: Unanswerable