Task: Question Answering
Input (English): Passage: Eakins referred to the painting as Swimming in 1885, and as The Swimmers in 1886. The title The Swimming Hole dates from 1917 (the year after Eakins died), when the work was so described by the artist's widow, Susan Macdowell Eakins. Four years later, she titled the work The Old Swimming Hole, in reference to the 1882 poem The Old Swimmin'-Hole; by James Whitcomb Riley. The Amon Carter Museum has since returned to Eakins' original title, Swimming.The painting shows Eakins and five friends or students bathing at Dove Lake, an artificial lake in Mill Creek outside Philadelphia. Each of the men is looking at the water, in the words of Martin A. Berger, "apparently lost in a contemplative moment". Eakins' precise rendering of the figures has enabled scholars to identify all those depicted in the work. They are (from left to right): Talcott Williams (1849–1928), Benjamin Fox (c. 1865 – c. 1900), J. Laurie Wallace (1864–1953), Jesse Godley (1862–1889), Harry the dog (Eakins' Irish Setter, c. 1880–90), George Reynolds (c. 1839–89), and Eakins himself. The rocky promontory on which several of the men rest is the foundation of the Mill Creek mill, which was razed in 1873. It is the only sign of civilization in the work—no shoes, clothes, or bath houses are visible. The foliage in the background provides a dark background against which the swimmers' skin tones contrast.
The positioning of the bodies and their musculature refers to classical ideals of physical beauty and masculine camaraderie evocative of Greek art. The reclining figure is a paraphrase of the Dying Gaul, and is juxtaposed with the far less formal self-depiction by the artist. It is possible that Eakins was seeking to reconcile an ancient theme with a modern interpretation; the subject was contemporary, but the poses of some of the figures recall those of classical sculpture. One possible influence by a contemporary source was Scène d'été, painted in 1869 by Frédéric Bazille (1841–70). It is not unlikely that Eakins saw the painting at the Salon while studying in Paris, and would have been sympathetic to its depiction of male bathers in a modern setting.In Eakins' oeuvre, The Swimming Hole was immediately preceded by a number of similar works on the Arcadian theme. These correspond to lectures he gave on Ancient Greek sculpture and were inspired by the Pennsylvania Academy's casts of Phidias' Pan-Athenaic procession from the Parthenon marbles. A series of photographs, relief sculptures, and oil sketches culminated in the 1883 Arcadia, a painting that also featured nude figures—posed for by a student, a nephew, and the artist's fiancée—in a pastoral landscape. 
Question: What are the four titles the painting has been referred as?
Output (English): The Old Swimming Hole.