Simplify the following text for a Grade 11 native English-speaking person.
Original: Perhaps responding to criticism and under pressure from Granz , who felt that Fitzgerald was given unsuitable material to record during this period , her last years on the Decca label saw Fitzgerald recording a series of duets with pianist Ellis Larkins , released in 1950 as Ella Sings Gershwin .
Simplified: Granz did not like some of the music Fitzgerald was given at this time , so during her last years on the Decca label she recorded some duets with pianist Ellis Larkins , released in 1950 as Ella Sings Gershwin .