input question: Extract the answer to the question from the following context. Question: What happens if a listener listens to two tones at the same time? Context: The just-noticeable difference (jnd) (the threshold at which a change is perceived) depends on the tone's frequency content. Below 500 Hz, the jnd is about 3 Hz for sine waves, and 1 Hz for complex tones; above 1000 Hz, the jnd for sine waves is about 0.6% (about 10 cents). The jnd is typically tested by playing two tones in quick succession with the listener asked if there was a difference in their pitches. The jnd becomes smaller if the two tones are played simultaneously as the listener is then able to discern beat frequencies. The total number of perceptible pitch steps in the range of human hearing is about 1,400; the total number of notes in the equal-tempered scale, from 16 to 16,000 Hz, is 120.???
output answer: then able to discern beat frequencies

input question: Extract the answer to the question from the following context. Question: Why is this important for countries? Context: The Rule of Law is especially important as an influence on the economic development in developing and transitional countries. To date, the term "rule of law" has been used primarily in the English-speaking countries, and it is not yet fully clarified even with regard to such well-established democracies as, for instance, Sweden, Denmark, France, Germany, or Japan. A common language between lawyers of common law and civil law countries as well as between legal communities of developed and developing countries is critically important for research of links between the rule of law and real economy.???
output answer: The Rule of Law is especially important as an influence on the economic development in developing and transitional countries

input question: Extract the answer to the question from the following context. Question: What is Canis familiaris? Context: In 2003, the ICZN ruled in its Opinion 2027 that if wild animals and their domesticated derivatives are regarded as one species, then the scientific name of that species is the scientific name of the wild animal. In 2005, the third edition of Mammal Species of the World upheld Opinion 2027 with the name Lupus and the note: "Includes the domestic dog as a subspecies, with the dingo provisionally separate - artificial variants created by domestication and selective breeding". However, Canis familiaris is sometimes used due to an ongoing nomenclature debate because wild and domestic animals are separately recognizable entities and that the ICZN allowed users a choice as to which name they could use, and a number of internationally recognized researchers prefer to use Canis familiaris.???
output answer: the dingo

input question: Extract the answer to the question from the following context. Question: Another term commonly used for a gift given on Christmas day is? Context: where a single prime denotes the real part and a double prime the imaginary part, Z() is the complex impedance with the dielectric present, Ccmplx() is the so-called complex capacitance with the dielectric present, and C0 is the capacitance without the dielectric. (Measurement "without the dielectric" in principle means measurement in free space, an unattainable goal inasmuch as even the quantum vacuum is predicted to exhibit nonideal behavior, such as dichroism. For practical purposes, when measurement errors are taken into account, often a measurement in terrestrial vacuum, or simply a calculation of C0, is sufficiently accurate.)???
output answer:
present