Simplify the following text for a Grade 6 native English-speaking person.
Original: Beethoven 's Symphony No. 7 , Bruckner 's Symphony No. 6 and Mendelssohn 's Symphony No. 4 comprise a nearly complete list of symphonies in this key in the Romantic era .
Simplified: Beethoven 's Symphony No. 7 , Bruckner 's Symphony No. 6 and Mendelssohn 's Symphony No. 4 are almost all the symphonies in this key in the Romantic era .