Complex sentence: Gutierrez had a friend named Bernardino Gargol, who owned marmalade and guava paste factories in Cuba, and was also a native Cuban who lived in New York and ran an import-export business.
Split into simpler sentences: Gutierrez had a friend named Bernardino Gargol, who owned marmalade and guava paste factories in Cuba. Gargol was a native Cuban who, like Gutierrez, lived in New York and ran an import-export business.