## 2 Materials and Methods  
### Cheese Samples  
Forty-nine cheese samples of different species origin, type of cheese, and country of provenance were bought from local grocery stores in Cyprus and are presented in Table 1. Cheddar cheese (C1-C15) is only made from cow milk, and it comes mainly from Ireland and the United Kingdom. Two Cheddar samples came from New Zealand and the Netherlands. Kefalotyri cheese (K1-K14) is made from cow or goat and sheep milk, and all the samples were made in Cyprus or Greece, and only one in Denmark. The Pecorino Toscano samples (T1-T3) were from Italy with sheep milk. The Frico Chervette (T4-T5) samples came from the Netherlands, and they were made of goat milk. The Pecorino Romano samples (T7, T14) from Italy were made of sheep milk. One Havarti cheese sample (T22) from Denmark was made of cow milk. Both Kefalograviera samples (T23-T24) originated from Greece and were made of goat and sheep milk. Two Emmental samples (T25, T32) were made of cow milk and originated from Germany and France, respectively. T26 is a Manchego cheese produced using sheep milk in Spain. T27 is a Mozzarella cheese from Denmark, made of cow milk. Respectively, T29-T31 are a Regato, a Gouda, and a Quark cheese from Belgium, Ireland, and Latvia, all made of cow milk. T36 is a Pecorino Caggiano cheese from Italy made of sheep milk. A cream cheese spread was included with code T37, made of cow milk in Austria. Lastly, T38 is a Queso De Cabra cheese made of goat milk in Spain.  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{**No.**} & \multirow{2}{*}{**Label**} & **Type of** & **Animal Origin** & **Country of** & **No.** & **Label** & **Type of Cheese** & **Animal Origin** & **Country of** \\  & & **Cheese** & **of Milk** & **Provenance** & & **of Milk** & **Provenance** \\ \hline
1 & C1 & CHEDDAR & Cow & New Zealand & 25 & K10 & KEFALOTYRI & Goat and Sheep & Cyprus \\ \hline
2 & C2 & CHEDDAR & Cow & Somerset, England & 26 & K11 & KEFALOTYRI & Cow & Greece \\ \hline
3 & C3 & CHEDDAR & Cow & Somerset, England & 27 & K12 & KEFALOTYRI & Cow & Cyprus \\ \hline
4 & C4 & CHEDDAR & Cow & Davidstow, United Kingdom & 28 & K13 & KEFALOTYRI & Goat and Sheep & Greece \\ \hline
5 & C5 & CHEDDAR & Cow & England & 29 & K14 & KEFALOTYRI & Sheep & Greece \\ \hline
6 & C6 & CHEDDAR & Cow & Ireland & 30 & T1 & PECORINO & Sheep & Italy \\ \hline
7 & C7 & CHEDDAR & Cow & England & 31 & T2 & PECORINO & \\  & & & & & TOSCANO FRESCO & Sheep & Italy \\ \hline
8 & C8 & CHEDDAR & Cow & Ireland & 32 & T3 & PECORINO & \\  & & & & & TOSCANO & & Sheep & Italy \\ \hline
9 & C9 & CHEDDAR & Cow & Ireland & 33 & T4 & FRICO CHERYETTE & Goat & Holland \\ \hline
10 & C10 & CHEDDAR & Cow & Ireland & 34 & T5 & FRICO CHERYETTE & Goat & Holland \\ \hline
11 & C11 & CHEDDAR & Cow & England & 35 & T7 & PECORINO & \\  & & & & ROMANO & & Sheep & Italy \\ \hline
12 & C12 & CHEDDAR & Cow & United Kingdom & 36 & T14 & PECORINO & \\  & & & & & ROMANO & & Sheep & Italy \\ \hline
13 & C13 & CHEDDAR & Cow & Netherlands & 37 & T22 & HAVARTI & Cow & Denmark \\ \hline
14 & C14 & CHEDDAR & Cow & Somerset, England & 38 & T23 & KEFALOGRAVIERA & Goat and Sheep & Greece \\ \hline
15 & C15 & CHEDDAR & Cow & United Kingdom & 39 & T24 & KEFALOGRAVIERA & Goat and Sheep & Greece \\ \hline
16 & K1 & KEFALOTYRI & Cow & Denmark & 40 & T25 & EMMENTAL & Cow & Germany \\ \hline
17 & K2 & KEFALOTYRI & Sheep & Cyprus & 41 & T26 & MANCHEGO & Sheep & Spain \\ \hline \hline \end{tabular}
\end{table}
Table 1: Information about the cheese samples.  
Therefore, the samples contained either cow-origin milk or goat- and sheep-origin milk. Based on their label, none of the samples had a mixture of the three milk species, to keep the dataset simple.