In this task, you will be presented with a context passage, a question about that paragraph, and a possible answer to that question. The task is to check the validity of the answer. Answer with "Yes" or "No".

Ex Input:
Fossils can be used to match up rock layers. As organisms change over time, they look different. Older fossils will look different than younger fossils. Some organisms only survived for a short time before going extinct. Knowing what organisms looked like at certain times also helps date rock layers. Some fossils are better than others for this use. The fossils that are very distinct at certain times of Earths history are called index fossils. Index fossils are commonly used to match rock layers. You can see how this works in Figure 2.30. If two rock layers have the same index fossils, then they're probably about the same age. <sep>How are fossils used to match up rock layers?<sep>They match the mineral deposits

Ex Output:
No

Ex Input:
Still untaken are several steps that required goodwill from local bar associations and others who had opposed the combination. "[I am] not a fan of Neal's," admitted John Peck, a former board member of the San Gabriel-Pomona Valley program and a Pasadena Bar Association board member. Peck says bad feelings still linger among Ailies of the old program who feel left out. "They really screwed us. We had a good program," Peck said. An observer familiar with the reconfiguration debate who requested anonymity wondered why Dudovitz had not spent more time mending fences. "He ought to be bending over backwards for reconciliation, but if you want to do impact work and people in the San Gabriel Valley want direct services, you have to accommodate that or change your approach," the observer said. "Neal would never consider doing that." More than a year after he officially incorporated the San Gabriel-Pomona Valley, Dudovitz had not placed a local resident on the board of Neighborhood Legal Services or made the rounds of the private legal community to recruit the volunteer lawyers. "Our emphasis has been on having our potential clients know about us and deliver services to them," Dudovitz said. "We have done that spectacularly." He did not hire any of the old program's nine lawyers and has yet to permanently place any of his 18 new hires in the San Gabriel-Pomona Valley. The lack of a legal aid presence in Pomona prompted the bar association and court officials to start their own once-monthly family law clinic. After learning of the effort, Dudovitz sent personnel to staff the clinic for three hours per week and is helping to write a grant application to fund a self-help kiosk for Pomona patterned on the center he pioneered in Van Nuys. The help, although late, has earned Dudovitz some appreciation. "There has been a transition and [the clinic] has helped to fill some void," said Deni Butler, administrator for the Eastern District Superior Court. "But we are working together quite nicely contrary to what the other side issue is." Scott Wheeler, president of the Eastern Bar Association of Los Angeles and an ally of the old program, said he mobilized his 200 members to staff the clinic after watching the ranks of unserved poor grow over the past year. <sep>What did Dudovitz feel he had done spectacularly?<sep>Successfully made amends to John Peck

Ex Output:
No

Ex Input:
French and British Ties and Occupation: The daughter of Ferdinand and Isabella married the son and heir of the Holy Roman Emperor, Maximilian of Hapsburg. The Spanish crown duly passed to the Hapsburgs, and Spain remained in their hands until the feeble-minded Carlos II died in 1700, leaving no heir. France seized the chance to install the young grandson of Louis XIV on the Spanish throne. A rival Hapsburg claimant was supported by Austria and Britain, who saw a powerful Spanish-French alliance as a major threat. In the subsequent War of the Spanish Succession (17021713) most of the old kingdom of Aragon, including the Balearics, backed the Hapsburgs. Britain seized Gibraltarin the name of the Hapsburg claimantand retained it when the war was over. In 1708 Britain captured Menorca, and the magnificent harbor of Mahon (Mao), for the Royal Navy. England clung to it even when Bourbon forces captured Mallorca at the end of the war. Menorca changed hands between Britain, France, and Spain five more times in less than a century. Britain finally ceded the island to Spain in the year 1802, under the terms of the Treaty of Amiens. By 1805, Spain was once more aligned with France, and Spanish ships fought alongside the French against Nelson at Trafalgar. Napoleon came to distrust his Spanish ally and forcibly replaced the king of Spain with his own brother, Joseph Bonaparte. A French army marched in to subdue the country. The Spanish resisted and, aided by British troops commanded by the Duke of Wellington, drove the French out. What British historians call the Peninsular War (18081814) is known in Spain as the War of Independence. In the 19th century, practically all of Spain's possessions in the Americas broke away in the wake of the Napoleonic Wars, and the few that remained were lost at the end of the 19th century. The Balearics, further neglected, were beset with poverty and outbreaks of disease. However, toward the 20th century, things began to improve on the islands, with Mallorca reaping the rewards of successful agricultural crops and Menorca launching an export shoe industry. <sep>Approximately how many centuries passed between the War of the Spanish Succession and when things began to improve on Mallorca and Menorca?<sep>4

Ex Output:
No