How to find sub-strings in an array of strings, extract and store them (using "contains" function) without "loops" and "for"

Hi,

I have a sample(A) and reference lists (B) and i want to find a substring, extract and store as showed in the example below:

Sample A is a 3X1 string array

A = ["roots of Datura stramonium";"roots of Datura stramonium, Datura first";"roots of Datura stramonium, Datura first, Datura second"]

Reference B is a 3X1 string array

B = ["Datura first";"Datura second","Datura Stramonium"]

I want to find each element of B in A and storage the results like in example Result:

Result= ["roots of Datura stramonium","Datura stramonium",missing,missing;
         "roots of Datura stramonium, Datura first","Datura stramonium","Datura first",missing;
         "roots of Datura stramonium, Datura first, Datura second","Datura stramonium","Datura first","Datura second"]

For that I was trying to use find and contains functions as follows:

Spec_cont=find(contains(A(1:end,1),B, 'IgnoreCase',true));

However, constains doesn't support multiple entries at once. So I used a loop to access each element of B. Since I have almost 100k rows this takes a long time to perform. How can I avoid loops in this case?

Second question:

How can I store Spec_cont outputs as shown in the Result output, since I will have different row sizes (for each loop i have to store in a different place)

Currently My code is like that:

for j=1:length(B)
   
   Spec_cont=find(contains(A(1:end,1),B, 'IgnoreCase',true));
   
    if isempty(Spec_cont)==1
        
    else
        for k=1:length(Spec_cont)
                
            Position=size(A,2)-sum(ismissing(A(Spec_cont(k,1),1:end)));
            A(Spec_cont(k,1),Position+1)=B;
            
        clear Position
        end
    end
end

Thank you very much

Alan