Problem: After the success of quantum electrodynamics, Feynman turned to quantum gravity. By analogy with the photon, which has spin 1, he investigated the consequences of a free massless spin 2 field, and derived the Einstein field equation of general relativity, but little more. The computational device that Feynman discovered then for gravity, "ghosts", which are "particles" in the interior of his diagrams that have the "wrong" connection between spin and statistics, have proved invaluable in explaining the quantum particle behavior of the Yang–Mills theories, for example, QCD and the electro-weak theory.
Where did  Feynman find success before moving to quantum gravity
The answer is the following: quantum electrodynamics

Problem: In the aftermath, all power was transferred from the East India Company to the British Crown, which began to administer most of India as a number of provinces. The Crown controlled the Company's lands directly and had considerable indirect influence over the rest of India, which consisted of the Princely states ruled by local royal families. There were officially 565 princely states in 1947, but only 21 had actual state governments, and only three were large (Mysore, Hyderabad and Kashmir). They were absorbed into the independent nation in 1947–48.
How did Britain govern the vast area of India?
The answer is the following: provinces

Problem: Season six began on Tuesday, January 16, 2007. The premiere drew a massive audience of 37.3 million viewers, peaking in the last half hour with more than 41 million viewers.
What year did the sixth season of American Idol first air?
The answer is the following: 2007

Problem: Immanuel Kant, in the Critique of Pure Reason, described time as an a priori intuition that allows us (together with the other a priori intuition, space) to comprehend sense experience. With Kant, neither space nor time are conceived as substances, but rather both are elements of a systematic mental framework that necessarily structures the experiences of any rational agent, or observing subject. Kant thought of time as a fundamental part of an abstract conceptual framework, together with space and number, within which we sequence events, quantify their duration, and compare the motions of objects. In this view, time does not refer to any kind of entity that "flows," that objects "move through," or that is a "container" for events. Spatial measurements are used to quantify the extent of and distances between objects, and temporal measurements are used to quantify the durations of and between events. Time was designated by Kant as the purest possible schema of a pure concept or category.
What type of measurements are used to quantify the duration of events?
The answer is the following:
temporal measurements