instruction:
This task is about writing a correct answer for the reading comprehension task. Based on the information provided in a given passage, you should identify the shortest continuous text span from the passage that serves as an answer to the given question. Avoid answers that are incorrect or provides incomplete justification for the question.
question:
Passage: Reflections generally affect polarization. For radio waves, one important reflector is the ionosphere which can change the wave's polarization. Thus for signals received following reflection by the ionosphere (a skywave), a consistent polarization cannot be expected. For line-of-sight communications or ground wave propagation, horizontally or vertically polarized transmissions generally remain in about the same polarization state at the receiving location. Matching the receiving antenna's polarization to that of the transmitter can make a very substantial difference in received signal strength. Question: What reflector can change the waves polarization?
answer:
ionosphere


question:
Passage: Technicolor (formerly called Thomson Consumer Electronics) claims to control MP3 licensing of the Layer 3 patents in many countries, including the United States, Japan, Canada and EU countries. Technicolor has been actively enforcing these patents. Question: What patent does Technicolor claim to control?
answer:
Layer 3


question:
Passage: Later the emphasis was on classical studies, dominated by Latin and Ancient History, and, for boys with sufficient ability, Classical Greek. From the latter part of the 19th century this curriculum has changed and broadened: for example, there are now more than 100 students of Chinese, which is a non-curriculum course. In the 1970s, there was just one school computer, in a small room attached to the science buildings. It used paper tape to store programs. Today, all boys must have laptop computers, and the school fibre-optic network connects all classrooms and all boys' bedrooms to the internet. Question: How many computers were at Eaton in the 1970s?
answer:

just one