I have four fields in my form
1) description 1
2) description 2
3) description 3 and
4) keywords.

The keywords may be present in either of the descriptions or all of them.
1) How will I check the availability of the keywords in each of these descriptions and display them.
2) In the mysql table, the keywords should be stored corresponding to the descriptions.

How will I perform the above mentioned actions?

In the attached image of the table, the 1st row indicates name1, description1 and keyword
the 2nd row indicates name2, description2 and keyword
the 3rd row indicates name3, description3 and keyword.

The keyword "climate" belongs to description2 alone. I don't want it to be entered corresponding to description1 and description3. How is it possible?