Using Context Free Grammar to Generate sentences!

Adam thought that Mary wallowed strongly in an umbrella .

an apple in every fine fine desk with an umbrella in an umbrella in Sally assumed that Adam on Jason disliked Mary in the bell .

the president sighed extremely .

a president on Mary walked deeply .

that an apple engaged an observer understood an apple .

the chief of staff jumped badly .

Mary and the chief of staff engaged and engaged an apple .

is it true that Mary in every perplexed floor on Adam under Adam in an observer walked badly ?

a sandwich engaged every president on an apple under a president with an umbrella .

does Adam eat the proposal ?