code: def forward(self, x, edge_index):
      x = F.dropout(x, p=0.5, training=self.training)
      x = self.conv1(x, edge_index).relu()
      x = F.dropout(x, p=0.5, training=self.training)
      x = self.conv2(x, edge_index)
      return x
  
file_path: pytorch_geometric/examples/ogbn_papers_100m.py
imports: import os
  import time
  from typing import Optional
  import torch
  import torch.nn.functional
  from ogb.nodeproppred import PygNodePropPredDataset
  from torch_geometric.loader import NeighborLoader
  from torch_geometric.nn import GCNConv
label_desc: Use image node_id 2 for calling the GCN obj's underlying member method code with example usage: obj.forward(x, edge_index) and returns: x