Given the question: Read the following paragraph and extract the answer for the question: What is the spatial device Bacon continued to incorporate and used many times throughout his career?  As an artist, Francis Bacon was a late starter. He painted sporadically and without commitment during the late 1920s and early 1930s, when he worked as an interior decorator and designer of furniture and rugs. He later admitted that his career was delayed because he had spent so long looking for a subject that would sustain his interest. He began to paint images based on the Crucifixion in 1933, when his then-patron Eric Hall commissioned a series of three paintings based on the subject. These abstract figurations contain formal elements typical of their time, including diaphanous forms, flat backgrounds, and surrealist props such as flowers and umbrellas. The art critic Wieland Schmied noted that while the early works are "aesthetically pleasing", they lack "a sense of urgency or inner necessity; they are beautiful, but lifeless". The sentiment is echoed by Hugh Davies, who wrote that Bacon's 1933 paintings "suggest an artist concentrating more on formal than on expressive concerns". Bacon admitted that his early works were not successful; they were merely decorative and lacking in substance. He was often harshly self-critical during this period, and would abandon or destroy canvasses before they were completed. He abandoned the Crucifixion theme, then largely withdrew from painting in frustration, instead immersing himself in love affairs, drinking and gambling.When he returned to the topic of the Crucifixion eleven years later, he retained some of the stylistic elements he had developed earlier, such as the elongated and dislocated organic forms that he now based on Oresteia. He continued to incorporate the spatial device he was to use many times throughout his career—three lines radiating from this central figure, which was first seen in Crucifixion, 1933. Three Studies was painted over the course of two weeks in 1944, when, Bacon recalled, "I was in a bad mood of drinking, and I did it under tremendous hangovers and drink; I sometimes hardly knew what I was doing. I think perhaps the drink helped me to...
The answer is:
three lines radiating from this central figure