Answer:
Lets complete the sentence:
"Los sábados, todos nosotros _____ a una clase de yoga a las siete y media. Mi madre es buena en yoga, pero mi padre ____"
A rough translation of this would be:
"The Saturdays, all of us____ to a yoga class at seven and half. My mother is good at yoga, but my father_____"
The first blank can be completed with a "Go" that in Spanish means "Vamos" and the second blank can be completed with a "not" or a "no" in Spanish.
So the complete sentence is:
Los sábados, todos nosotros vamos a una clase de yoga a las siete y media. Mi madre es buena en yoga, pero mi padre no.