Complex sentence: In 1988, he joined the "MAC crew", a group of Parisian graffiti artists with whom he painted from 1989 to 2001 monumental murals, particularly in the United States where he collaborated with New-York graffiti artists "TATS cru".
Split into simpler sentences: In 1988, he joined the "MAC crew", a collective of Parisian graffiti artists. With them, between 1989 and 2001, he painted huge murals, particularly in the US where he painted with New-York graffiti artists "TAT cru".