which actions happened first
100
I called Pedro to invite him to the party but Luisa had already invited him.

Luisa had already invited him.

200

Pedro gave me a present that he had given to his ex-girlfriend too.

he had given to his ex-girlfriend too.

300
My sister's company had stopped paying her and went backrupt.

My sister's company had stopped paying her

400

I had been dating Pedro for 3 years before he called me his girlfriend.

I had been dating Pedro for 3 years

500

She was sleeping when I called. 

She was sleeping

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