<｜begin▁of▁sentence｜>### Instruction:
As a marine biologist, you've been conducting extensive research on coral reef ecosystems in the Caribbean. Recently, you've collected a vast amount of data on the interconnectedness of various marine organisms within these reefs, stored in a file named 'reef_network.gml'. To better visualize and analyze this data, you've decided to utilize the Fruchterman-Reingold layout algorithm, which simulates the spatial arrangement of nodes in a network based on their connections and interactions.

Your goal is to extract the geographical coordinates of the first two coral species from the reef network using the Fruchterman-Reingold layout algorithm. Once you have these coordinates, you plan to overlay them onto a map of the Caribbean region to observe the spatial distribution of these coral species within the reef ecosystem. Additionally, you aim to generate a visual representation of the graph layout, which will be saved as 'coral_network_layout.png', providing a clear depiction of the spatial organization of the reef network. Finally, you intend to print out the extracted coordinates for further analysis and interpretation in your ongoing research efforts.
### Response:
import igraph as ig
from igraph.drawing import Plot

# Load a graph
file_path = 'network.gml'
g = ig.read(file_path)

# Calculate the layout using the Fruchterman-Reingold layout algorithm
layout = g.layout_fruchterman_reingold()

# Access the coordinates of the first vertex
first_vertex_coords = layout[0]

# Access the coordinates of the second vertex
second_vertex_coords = layout[1]

# Initialize plot
plot = Plot()

# Add the graph to the plot with the previously calculated layout
plot.add(g, layout=layout)

# Save the plot to an image file
plot.save('graph_layout.png')

# Print the coordinates
print('Coordinates of the first vertex:', first_vertex_coords)
print('Coordinates of the second vertex:', second_vertex_coords)
<|EOT|>
