This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.

Input: Consider Input: Passage: Shell sold 9.5% of its 23.1% stake in Woodside Petroleum in June 2014 and advised that it had reached an agreement for Woodside to buy back 9.5% of its shares at a later stage. Shell became a major shareholder in Woodside after a 2001 takeover attempt was blocked by then federal Treasurer Peter Costello and the corporation has been open about its intention to sell its stake in Woodside as part of its target to shed assets. At a general body meeting, held on 1 August 2014, 72 percent of shareholders voted to approve the buy-back, short of the 75 percent vote that was required for approval. A statement from Shell read: "Royal Dutch Shell acknowledges the outcome of Woodside Petroleum Limited's shareholders' negative vote on the selective buy-back proposal. Shell is reviewing its options in relation to its remaining 13.6 percent holding." Question: What percentage of shareholder votes was need to approve the 2014 buy-back?

Output: 75

Input: Consider Input: Passage: At present the A35 autoroute, which parallels the Rhine between Karlsruhe and Basel, and the A4 autoroute, which links Paris with Strasbourg, penetrate close to the centre of the city. The Grand contournement ouest (GCO) project, programmed since 1999, plans to construct a 24 km (15 mi) long highway connection between the junctions of the A4 and the A35 autoroutes in the north and of the A35 and A352 autoroutes in the south. This routes well to the west of the city and is meant to divest a significant portion of motorized traffic from the unite urbaine. Question: How far is the connection between junctions A4 and the A35?

Output: 24 km

Input: Consider Input: Passage: Through-hole manufacture adds to board cost by requiring many holes to be drilled accurately, and limits the available routing area for signal traces on layers immediately below the top layer on multi-layer boards since the holes must pass through all layers to the opposite side. Once surface-mounting came into use, small-sized SMD components were used where possible, with through-hole mounting only of components unsuitably large for surface-mounting due to power requirements or mechanical limitations, or subject to mechanical stress which might damage the PCB. Question: What type of boards end up with limited routing space in through-hole manufacture?
Output: multi-layer