Read the following premise and answer if the hypothesis is true.
Thereafter, in 1831, 1909, 1976, and 1998, and in numerous private copyright bills and temporary extensions of the copyright law and in repeated patent law revisions, Congress extended the terms of Federal copyright and patent protection of subsisting works.
Hypothesis: The terms of Federal copyright  were not extended in 1830. Is the answer "Yes", "No", or "It's impossible to say"? Respond with only the answer and no additional text.
Yes
It's impossible to say. The premise only mentions extensions after 1831.