Given the task definition and input, reply with output. In this task, you will use your knowledge about language (and common sense) to determine what element the marked number refers to. The numbers are marked with two underlines around them, like: _ number _. Your answer should be chosen from the given text, and should not contain other words.

Penny 'Grams' Halliwell:  We are gathered here today to unite two souls as _ one _ . Do you , Leo Wyatt , and Piper Halliwell , join us here of your own free will to acknowledge the eternal bond shared by both of you .
Leo Wyatt: I do .
Piper Halliwell: I do .
Penny 'Grams' Halliwell: You may face each other , join hands . Leo , you may recite your vows .
Leo Wyatt: Piper , through all the tears and struggles , I always knew in my heart that we 'd make it here . I promise to love and respect you from this point forward as your husband , as my wife , my lover , my friend , and my soul mate . All I am is yours .
Penny 'Grams' Halliwell: Piper .
Piper Halliwell: Leo , you are the best thing that has ever happened to me . I was afraid that you were too good to be true , that maybe I did n't deserve someone so pure and beautiful and loving as you are . But here we are surrounded by the people that I love the most and I feel so proud , and so blessed to be your wife . Leo , I was born to love you and I always will .
Penny 'Grams' Halliwell: Here before witnesses , Leo and Piper have sworn their vows towards each other . With this cord , I bind them to those vows .
Piper Halliwell, Leo Wyatt: Heart to thee , body to thee , always and forever , so mote it be .
Penny 'Grams' Halliwell: So mote it be .
Prue Halliwell, Phoebe Halliwell: So mote it be .
Penny 'Grams' Halliwell: Kiss her fast .

souls