In this task you will be given an answer to a question. You need to generate a question. The answer given should be a correct answer for the generated question.

Ex Input:
Cross-validation, sometimes called rotation estimation, or out-of-sample testing is any of various similar model validation techniques for assessing how the results of a statistical analysis will generalize to an independent data set. It is mainly used in settings where the goal is prediction, and one wants to estimate how accurately a predictive model will perform in practice. In a prediction problem, a model is usually given a dataset of known data on which training is run (training dataset), and a dataset of unknown data (or first seen data) against which the model is tested (called the validation dataset or testing set )., The goal of cross-validation is to test the model's ability to predict new data that was not used in estimating it, in order to flag problems like overfitting or selection bias and to give an insight on how the model will generalize to an independent dataset (i.e., an unknown dataset, for instance from a real problem).

Ex Output:
cross-validation of findings from a prediction study is particularly important for


Ex Input:
The name has been popularly associated with the Italian word mia, meaning 'mine', and also recognized as a derivation from the Slavic word mila, meaning 'dear, darling'.

Ex Output:
what does the name mia mean in the urban dictionary


Ex Input:
Sydney (/ ˈsɪdni / (listen)) is the state capital of New South Wales and the most populous city in Australia and Oceania. Located on Australia's east coast, the metropolis surrounds Port Jackson and sprawls about 70 km (43.5 mi) on its periphery towards the Blue Mountains to the west, Hawkesbury to the north, and Macarthur to the south. Sydney is made up of 658 suburbs, 40 local government areas and 15 contiguous regions. Residents of the city are known as 'Sydneysiders'. As of June 2017, Sydney's estimated population was 5,131,326.

Ex Output:

what is the population of sydney in 2017