"The mother beats up her daughter because she was drunk."
Here, "She" may refer either to 'the mother' or to 'her daughter'. We can remove this ambiguity in any one of the following ways :
- "The mother beats up her daughter because she (the mother) was drunk."
Or,
"The mother beats up her daughter because the mother was drunk."
Or,
"The mother beats up her daughter because the former was drunk."
And
- "The mother beats up her daughter because she (her daughter) was drunk."
Or,
"The mother beats up her daughter because the daughter was drunk.
Or,
"The mother beats up her daughter because the latter was drunk."