Task: Question Answering
Input (English): Background Paragraph: As a star begins to run low on hydrogen, since the initial quantity has been fused into the denser helium gas, the core will contract due to gravity. The collapsing core increases temperature to the point that the star can begin to fuse helium into carbon. When that happens, the outer portion of the star expands greatly due to the higher temperature. The star can expand to 1000 times the diameter of the sun. At this point, the star is called a red giant . If our sun became a red giant, its surface would expand out past the orbit of Mars. Red giants are red because the surface of the star is cooler than white or blue stars, but remain highly visible because of their gigantic size. 
Story: A star names Andromeda has been being observed for years. Over time, it has been seen that the star remains visible but has been turning more and more red. 
Question: Given the color of Andromeda becomes more red, is it's surface temperature increasing or decreasing?
Output (English): decreasing.