Brewing effect: refers to the phenomenon that "the problem has not been solved, and a satisfactory answer is unexpectedly obtained after a period of time. ". Which of the following does not involve brewing effects? ['Mountains and rivers have no doubt, Liu An Hua Ming You Yi Village.', 'Looking back, the man was in the midst of the lights.', 'Stepping on iron shoes and finding nowhere, no effort is required.', 'Two sentences in three years, one tear and one tear.']