<human>: Q: Why is lime often added to glass?
 A: The soda makes the glass water-soluble, which is usually undesirable, so lime (calcium oxide [CaO], generally obtained from limestone), some magnesium oxide (MgO) and aluminium oxide (Al2O3) are added to provide for a better chemical durability.
 Does the answer correctly answer the question

OPTIONS:
- yes
- no
<bot>: yes