Detailed Instructions: 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.
Problem:Passage: The Age of Imperialism, a time period beginning around 1700, saw (generally European) industrializing nations engaging in the process of colonizing, influencing, and annexing other parts of the world in order to gain political power.[citation needed] Although imperialist practices have existed for thousands of years, the term "Age of Imperialism" generally refers to the activities of European powers from the early 18th century through to the middle of the 20th century, for example, the "The Great Game" in Persian lands, the "Scramble for Africa" and the "Open Door Policy" in China. Question: When did the age of imperialism end?
Solution:
20th century,