Complex sentence: She would later (1981) publish an essay on her experiences in the essay My first voyage to the USA; while in the USA she met author Ramón J. Sender, with who she had an epistolar relationship.
Split into simpler sentences: She would later (1981) publish an essay of her experiences in "My first voyage to the USA". While in the USA she met author Ramón J. Sender, with who she had an epistolar relationship.