Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Input: Consider Input: The water droplets of fog form from water vapor in the air. Fog disappears when the water droplets change back to water vapor. These changes are examples of changes of state. A change of state occurs whenever matter changes from one state to another. Common states of matter on Earth are solid, liquid, and gas. Matter may change back and forth between any two of these states. Changes of state are physical changes in matter. They are reversible changes that do not change matters chemical makeup or chemical properties. For example, when fog changes to water vapor, it is still water and can change back to liquid water again. Several processes are involved in common changes of state. They include melting, freezing, sublimation, deposition, condensation, and evaporation. The Figure 1.1 shows how matter changes in each of these processes. Q: Which two processes result in matter changing to the solid state? A: The processes are deposition, in which matter changes from a gas to a solid, and freezing, in which matter changes from a liquid to a solid. Suppose that you leave some squares of chocolate candy in the hot sun. A couple of hours later, you notice that the chocolate has turned into a puddle like the one pictured in the Figure 1.2. Q: What happened to the chocolate? A: The chocolate melted. It changed from a solid to a liquid. In order for solid chocolate to melt and change to a liquid, the particles of chocolate must gain energy. The chocolate pictured in the Figure 1.2 gained energy from sunlight. Energy is the ability to cause changes in matter, and it is always involved in changes of state. When matter changes from one state to another, it either absorbs energyas when chocolate meltsor loses energy. For example, if you were to place the melted chocolate in a refrigerator, it would lose energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a solid Q: Why is energy always involved in changes of state? A: The energy of particles of matter determines the matters state. Particles of a gas have more energy than particles of a liquid, and particles of a liquid have more energy than particles of a solid. Therefore, in order for matter to change from a solid to a liquid or from a liquid to a gas, particles of matter must absorb energy. In order for matter to change from a gas to a liquid or from a liquid to a solid, particles of matter must lose energy.

Output: which process does not involve matter in the liquid state?


Input: Consider Input: Iron deficiency is the most common nutritional disorder affecting at least one third of world's population. Though anemia is common manifestation of iron deficiency, other effects of iron deficiency on various tissues, organs and systems are usually under recognized. Impaired brain development and cognitive, behavioural and psychomotor impairment are most worrisome manifestations of iron deficiency. Studies have demonstrated that some of these changes occurring during period of brain growth spurt (<2 years age) may be irreversible. Association of iron deficiency with febrile seizures, pica, breath holding spells, restless leg syndrome and thrombosis is increasingly being recognized. Impaired cell-mediated immunity and bactericidal function are generally noted in iron-deficient persons; however, the findings are inconsistent. Despite proven reversible functional immunological defects in vitro studies, a clinically important relationship between states of iron deficiency and susceptibility to infections remains controversial. Studies from malaria endemic regions have reported increased incidence of malaria in association with iron supplementation. These and some other aspects of iron deficiency are reviewed in this article.

Output: Which deficiency is the cause of restless leg syndrome?


Input: Consider Input: Researchers may tell us that spending money on experiences produces more happiness than spending money on things. Going to a bar with friends is always pleasurable in slightly different ways. However, on the other hand, a table may also give us lots of positive experiences sometimes. I just moved from New York City to suburban Pennsylvania, It's been quite a change of pace, with some positives and negatives, One of the best parts is that I'm spending more time outside. I quite enjoy staying outside, especially eating outside. I had a goal to eat outside as often as possible this summer, so one of my first purchases for the new house was a table and a set of chairs for the yard. Is my yard table a thing or an experience? It's clearly a thing and yet it enables the experience of eating outside. I love eating outside, and so my yard table is one of my favorite purchases, ever. Therefore I find the dividing line between things and experiences is more nuanced than at first glance. However, to be happy, the most important thing is what kind of purchases you have made. Sometimes we may all have purchases that seem like a waste of money like probably half the clothes in our closets, but how does this happen?' There are many reasons for why this happens. The biggest is that we spend a lot of our time working to earn money to buy things. The problem is that we buy a lot of stuff that we don't actually need. There's nothing worse than looking in your closet and realizing how many hours you spent laboring to buy things you never wear. But how about a table that lets you enjoy being outside in the summer? That's worth every minute and penny and from it you will also get more happiness.


Output: Which one is an example of spending money on experiences?


