Given the background description of some cooking related query, summarize the question into a title

Input: Consider Input: Do I need to store a mixture of olive oil and balsamic vinegar in the refrigerator?

Output: Does olive oil and balsamic vinegar together need to be refrigerated?

Input: Consider Input: I was just wondering if I can arrange raw chicken on the pizza base and cook everything along or if I should cook the chicken first separately.

Output: Should chicken be cooked beforehand while making pizza?

Input: Consider Input: Is there a special tool available just for cracking open pistachio nuts? I'm asking because as I have gotten older, I have developed severe arthritis and joint pains, making opening them with my fingers very painful. I've always loved pistachios and hate having to ask my wife to crack them open for me.I have tried using regular nut crackers, but the pistachio either slips out without cracking or the nut inside gets crushed.
Output: Cracking open a pistachio