Complex sentence: Mexico was the first Latin American member of the Organisation for Economic Co-operation and Development OECD (since 1994), and is classified as an upper-middle income country by the World Bank and a newly industrialized country by several analysts.
Split into simpler sentences: Mexico was the first Latin American member of the Organisation for Economic Co-operation and Development OECD (since 1994). It is classified as an upper-middle income country by the World Bank and a newly industrialized country by several analysts.