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".

Example Input: Density is also an important physical property of matter. The concept of density combines what we know about an objects mass and volume. Density reflects how closely packed the particles of matter are. When particles are packed together more tightly, matter is more dense. Differences in density of matter explain many phenomena. It explains why helium balloons rise. It explains why currents such as the Gulf Stream flow through the oceans. It explains why some things float in or sink. You can see this in action by pouring vegetable oil into water. You can see a colorful demonstration in this video. <sep>What are some things density explains?<sep>It explains why some things float in or sink
Example Output: Yes

Example Input: Take a look at this train in Figure 1.11. It looks very futuristic. What do you notice about it? Did you notice that the train has no wheels? How can a train have no wheels? It doesn't need wheels. It actually floats, or levitates, just above the track. Magnets enable the train to do this. This is not a normal train. This is a maglev train. The word maglev stands for magnetic levitation. Because it has no wheels, there is no friction. Some magnets hold the train up. Other magnets are used to move the train forward. This train can go very fast. It can reach speeds up to 480 kilometers (300 miles) per hour! Magnets are pretty cool. What exactly is a magnet? How is it able to exert such force? <sep>What do you observe about the train in Figure 1.11?<sep>It has no wheels
Example Output: Yes

Example Input:  Paul put the despised watch away And laid out before him his array Of stones and metals, and when the morning Struck the stones to their best adorning, He chose the brightest, and this new watch Was so light and thin it seemed to catch The sunlight's nothingness, and its gleam.  Topazes ran in a foamy stream Over the cover, the hands were studded With garnets, and seemed red roses, budded.  The face was of crystal, and engraved Upon it the figures flashed and waved With zircons, and beryls, and amethysts.  It took a week to make, and his trysts At night with the Shadow were his alone.  Paul swore not to speak till his task was done.  The night that the jewel was worthy to give.  Paul watched the long hours of daylight live To the faintest streak; then lit his light, And sharp against the wall's pure white The outline of the Shadow started Into form.  His burning-hearted Words so long imprisoned swelled To tumbling speech.  Like one compelled, He told the lady all his love, And holding out the watch above His head, he knelt, imploring some Littlest sign.  The Shadow was dumb. <sep>How long did it take to make the watch?<sep>Two weeks
Example Output:
No

