Importing similarity matrix

[polysemygirl]

I've done a sentence sorting task. It's generated a similarity matrix (attached), which shows what proportion of subjects put each pair of sentences into the same group. I'd like to use Gephi to create a network out of this data. I've spent a day Googling how to do this/how other people have done this, but I'm none the wiser.

I've seen previous posts mentioning that I'd need to import an edge table and a node table. Presumably the node table would be a list of the sentences. I don't know what the edge table would consist of. I'd be grateful if someone would answer the following questions:

1. Is there a way of importing the similarity matrix, as is, into Gephi? If not,
2. Would my node table look something like the second attachment? and
3. How can I convert the values in the similarity matrix into an edge table?

Thank you.

[polysemygirl]

Update:

I've changed the column and row headers to numbers (1-30), filled in the white spaces with zeroes, changed commas to semi-colons and imported the file using File > Open. Success!

However, I'd really like the nodes to be labelled with the sentences, rather than numbers. Is there a limit on node string length when importing the file through File > Open? I can go in and manually edit the node labels by copying and pasting the sentences in, and haven't had any error messages re: string length. In this case with 30 sentences, it's not a big deal. But I'll have more sentences in later versions of this task.

Thanks!