The phrase "was included in" can get boring when used repeatedly. To avoid monotony, the writer can flip through the thesaurus and find alternatives that could add zest to the sentence. Some of the synonyms for "was included in" that can be used are comprised, incorporated, embodied, encompassed, constituted, contained, and embedded. The author's choice of synonym could depend on the context and the overall tone of the text. By using diverse phrases, the author can create a rich and engaging story that would draw the readers in and keep them engaged throughout the read.