Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What was the author/editor/source when the l.a. ranking was 1st?

### Inputs:
table_name: table, columns: ['Index (Year)', 'Author / Editor / Source', 'Year of publication', 'Countries sampled', 'World Ranking (1)', 'Ranking L.A. (2)']

### Response:
SELECT Author / Editor / Source FROM table WHERE Ranking L.A. (2) = 1st