Table: agrona_linea
Columns: name
latitude
longitude
diameter_km
year_named
name_origin

Question: At the longitude of 355.0e, what is the name origin?
SQL: SELECT "name_origin" FROM agrona_linea WHERE "longitude" = '355.0E'

Question: What is the name origin of Morrigan Linea?
SQL: SELECT "name_origin" FROM agrona_linea WHERE "name" = 'Morrigan Linea'

Question: How many years have a longitude measure of 20.0e?
SQL: SELECT COUNT("year_named") FROM agrona_linea WHERE "longitude" = '20.0E'

Question: At a longitude of 293.0e, what is the diameter, in km?
SQL: SELECT "diameter_km" FROM agrona_linea WHERE "longitude" = '293.0E'