YOU SAID:
I Giorno Giovanna have a piano
INTO JAPANESE
ジョルノ・ジョヴァンナはピアノを持っています
BACK INTO ENGLISH
Giorno Giovanna has a piano
INTO JAPANESE
ジョルノジョヴァンナにはピアノがあります
BACK INTO ENGLISH
Giorno Giovanna has a piano
That didn't even make that much sense in English.