/// <summary>
/// Detect Person entities that may have entries in the Wikipedia and print all associated hyperlinks to the console
/// </summary>
/// <returns></returns>
static async Task Task3()
{
// Build the body (shared across calls)
var body = new JsonData();
var documents = body.SetEmptyArray("documents");
int i = 0;
foreach (string review in ReadReviewsFromJson().Take(5))
{
var document = documents.AddEmptyObject();
document["id"] = (++i).ToString();
document["text"] = review;
}
// Get all the persons:
var response = await client.GetEntitiesAsync(RequestContent.Create(body));
var responseBody = JsonData.FromBytes(response.Content.ToMemory());
if (response.Status != 200)
{
Console.Error.WriteLine(responseBody["error"]);
return;
}
var people = responseBody["documents"].Items.SelectMany(x => x["entities"].Items.Where(e => e["category"] == "Person").Select(e => e["text"])).Distinct();
// Now, get the links
response = await client.GetLinkedEntitiesAsync(RequestContent.Create(body));
responseBody = JsonData.FromBytes(response.Content.ToMemory());
// For any links, if they are about people in our list, print them.
if (response.Status == 200)
{
foreach (var document in responseBody["documents"].Items)
{
foreach (var entity in document["entities"].Items)
{
if (people.Contains(entity["name"]) && entity["dataSource"] == "Wikipedia")
{
Console.WriteLine($"Learn more about {entity["name"]} on {entity["dataSource"]} ({entity["url"]})");
}
}
}
}
else
{
Console.Error.WriteLine(responseBody["error"]);
}
}