tv/ movies: On which show did Lena Horne make her debut?

Questions

[pot luck] what is the nineteenth letter of the alphabet?

[pot luck] what is salinity a measure of?

[pot luck] the eggs of the sturgeon fish are an expensive delicacy what are they called?

[pot luck] bamboo is which of the following grass, tree, fern?

[pot luck] at twelve noon gmt on london what time is it in aukland new zealand?