Above-mentioned and First-string

Above-mentioned adjective - Mentioned or named earlier in the same text.

First-string and above-mentioned are semantically related. In some cases you can use "First-string" instead an adjective phrase "Above-mentioned".

First-string adjective - Of the very best kind.

Above-mentioned and first-string are semantically related. Sometimes you can use "Above-mentioned" instead an adjective phrase "First-string".