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.

Example Input: Passage: Advanced economies led global economic growth prior to the financial crisis with "emerging" and "developing" economies lagging behind. The crisis completely overturned this relationship. The International Monetary Fund found that "advanced" economies accounted for only 31% of global GDP while emerging and developing economies accounted for 69% of global GDP from 2007 to 2014. In the tables, the names of emergent economies are shown in boldface type, while the names of developed economies are in Roman (regular) type. Question: How much global GDP did "advanced" economies account for from 2007 to 2014?
Example Output: 31%

Example Input: Passage: As early as 1650, settlers from the Virginia colony moved into the area of Albemarle Sound. By 1663, King Charles II of England granted a charter to start a new colony on the North American continent; it generally established North Carolina's borders. He named it Carolina in honor of his father Charles I. By 1665, a second charter was issued to attempt to resolve territorial questions. In 1710, owing to disputes over governance, the Carolina colony began to split into North Carolina and South Carolina. The latter became a crown colony in 1729. Question: What year did King Charles II grant a charter to North America?
Example Output: 1663

Example Input: Passage: There are generally four recognized levels of tests: unit testing, integration testing, component interface testing, and system testing. Tests are frequently grouped by where they are added in the software development process, or by the level of specificity of the test. The main levels during the development process as defined by the SWEBOK guide are unit-, integration-, and system testing that are distinguished by the test target without implying a specific process model. Other test levels are classified by the testing objective. Question: What is defined in the SWEBOK guide as to testing the main levels?
Example Output:
unit-, integration-, and system testing