There are several details that are only found in one of the gospel accounts. For instance, only Matthew's gospel mentions an earthquake, resurrected saints who went to the city and that Roman soldiers were assigned to guard the tomb, while Mark is the only one to state the actual time of the crucifixion (the third hour, or 9 am) and the centurion's report of Jesus' death. The Gospel of Luke's unique contributions to the narrative include Jesus' words to the women who were mourning, one criminal's rebuke of the other, the reaction of the multitudes who left "beating their breasts", and the women preparing spices and ointments before resting on the Sabbath. John is also the only one to refer to the request that the legs be broken and the soldier's subsequent piercing of Jesus' side (as fulfillment of Old Testament prophecy), as well as that Nicodemus assisted Joseph with burial.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What detail of Jesus's Crucifiction was only found in Matthew's Gospel?
Ah, so.. an earthquake

It is the most widely used vaccine worldwide, with more than 90% of all children being vaccinated. The immunity it induces decreases after about ten years. As tuberculosis is uncommon in most of Canada, the United Kingdom, and the United States, BCG is administered only to those people at high risk. Part of the reasoning against the use of the vaccine is that it makes the tuberculin skin test falsely positive, reducing the test's use in screening. A number of new vaccines are currently in development.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In addition to the U.S. and Canada, what European country sees very few tuberculosis infections?
Ah, so.. the United Kingdom

Nearly all polychaetes have parapodia that function as limbs, while other major annelid groups lack them. Parapodia are unjointed paired extensions of the body wall, and their muscles are derived from the circular muscles of the body. They are often supported internally by one or more large, thick chetae. The parapodia of burrowing and tube-dwelling polychaetes are often just ridges whose tips bear hooked chetae. In active crawlers and swimmers the parapodia are often divided into large upper and lower paddles on a very short trunk, and the paddles are generally fringed with chetae and sometimes with cirri (fused bundles of cilia) and gills.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What are cirri?
Ah, so..
fused bundles of cilia