original passage: In the 1980s "Mathematical Games" began to appear only irregularly. Other authors began to share the column, and the June 1986 issue saw the final installment under that title. In 1981, on Gardner's retirement from "Scientific American", the column was replaced by Douglas Hofstadter's "Metamagical Themas", a name that is an anagram of "Mathematical Games".
original sentence: In the 1980s "Mathematical Games" began to appear only irregularly.
sentence2: If someone gathered all of the issues of Scientific American from 1984 and 1985, would you expect to find a Mathematical Games column in more than half of them?
sentence1: In the 1980s due to its growing popularity, the "Mathematical Games" column that had previous appeared only irregularly, became a regular monthly feature. Other authors began to share the column, and the June 1986 issue saw the final installment under that title. In 1986, on Gardner's retirement from "Scientific American", the column was replaced by Douglas Hofstadter's "Metamagical Themas", a name that is an anagram of "Mathematical Games".